Transcript RADCON TECHNICIAN CONTINUING TRAINING

RADCON
TECHNICIAN
TRAINING
Welcome-You may click the left mouse
button or use the Enter key to advance.
1
Foreign
Material
Exclusion
Computer Based Training
HPT001.113
2
About This Course

You may use the “P”
key to go to the
previous screen.
HPT001.113
3
About This Course

This Computer Based learning activity has been
developed from the material in the lesson plan on
Foreign Material Exclusion (HPT001.113).
Revision Prepared by:
Brian Fike
02/13/2004
Plant Concurrence BFN Brad Mitchell
Plant Concurrence BFN
Plant Concurrence BFN
TVAN Corporate
Concurrence
HPT001.113
4
Foreign Material Exclusion
OBJECTIVES
 Terminal
Objective:
– Upon completion of this lesson the student will
demonstrate satisfactory knowledge of the
TVAN Foreign Material Control Program by
scoring at least 80% on an examination. SPP6.5 is allowed as reference material for the
exam.
HPT001.113
5
Foreign Material Exclusion
OBJECTIVES
 The
examination for this CBT will be
provided on the computer.
 A proctor must allow you access to the
examination.
 The software will score each question as
you answer it.
HPT001.113
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Foreign Material Exclusion
OBJECTIVES

Enabling Objectives
1. Define terms outlined in the FME procedure and this course.
2. State the purpose of Foreign Material Exclusion.
3. Identify responsibilities of various personnel for work preparation
through job closure to include recovery from loss of FME controls.
4. Identify the most common causes of Foreign Material Intrusion
(FMI).
5. Identify potential radiological hazards and other concerns resulting
from FMI or loss of FME controls
6. Identify FME requirements for special activities and specific areas.
7.
Identify points from industry events concerning FME, including
SOER 95-1.
8. Correlate error prevention tools used to prevent foreign material
intrusion.
HPT001.113
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Foreign Material Exclusion
REFERENCES
A. SPP-6.5, Foreign Material Control, Revision 7, effective
date 07/11/2003.
B. HPT001.113, Foreign Material Exclusion, RADCON
Technician Training Program, Revision 0.
C. INPO SOER 95-1, Reducing Events Resulting from Foreign
Material Intrusion.
D. BFN PERs
E. NRC Inspection Report No. 50-390/97-11
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Foreign Material Exclusion
Training Materials and Aids
 Access
and/or print the following
documents you will need for the course by
clicking on the icon:
SPP 6.5, “Foreign Material Control, latest revision.
Student Notebook
HPT001.113
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Foreign Material Exclusion
Introduction
Foreign material introduced into plant systems can
cause equipment degradation, inoperability of
components, or even fuel damage which may lead
to higher radiation and contamination levels.
HPT001.113
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Foreign Material Exclusion
Introduction
Intrusion of foreign material into primary systems
can also create activated products which cause
more radiation dose to personnel.
HPT001.113
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TVAN has had its share of FME
events. Just a few are included
here.
Foreign Material Exclusion
Introduction - BFN
Events
– 1998 - A hose was floating in the Unit 3 spent fuel
storage pool. The hose broke and part fell to the bottom
of the pool.
– 1998 - Foreign material was found in steam trap 2TRP-073-005 at BFN and appeared to be welding slag
and grinding dust. The trap had been replaced during
U2C9 outage.
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Foreign Material Exclusion
Introduction - BFN
Events
– 1997 - Clear cellophane wrap was used to support
RADCON activities on the refuel floor. This is
contrary to FME control requirements.
– 1995 - Plastic type material was wrapped around the
lower suction portion of the BFN 3A core spray pump
impeller.
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Foreign Material Exclusion
Introduction

Significant industry events
continue to occur due to
inadequate control of
Foreign Material.

INPO SOER 95-1
provides insights into the
most prevalent causes of
foreign material intrusion
events and identifies some
effective industry
practices for preventing
foreign material intrusion.
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Foreign Material Exclusion
Introduction
 Several
other events and SOER 95-1 concerning
foreign material intrusion will be reviewed later in
this course.
HPT001.113
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Foreign Material Exclusion
Introduction

FME Control Program
For these reasons,
nuclear plants have a
Foreign Material
Control program in
place.
HPT001.113
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Foreign Material Exclusion
Introduction

SPP 6.5, Foreign Material Controls, provides
requirements for maintaining nuclear plant
cleanliness by preventing the uncontrolled
introduction of foreign material such as
maintenance residue, dirt, debris, or tools into
open systems or components, and recovery from
intrusion of foreign material.
HPT001.113
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Foreign Material Exclusion
SPP-6.5, Foreign
Material Control,
emphasizes an attitude
of
“focus on
prevention” .
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Foreign Material Exclusion
Introduction

In addition to programs
and procedural
direction, our work
practices and habits
have a great impact on
the end result of all that
we do.
The success of TVAN’s FMI
Program depends on YOU!
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Foreign Material Exclusion
Procedure

SPP 6.5 requirements
apply to all maintenance,
modification, operations
and testing activities
which involve open
systems or components.
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Foreign Material Exclusion
Procedure

FME
Controls
The methods used to
control foreign materials
within areas will depend
on the configuration and
safety significance of the
system, the activity being
performed, and the
probability of foreign
material intrusion.
Procedure Adherence is an error prevention tool!!!
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Foreign Material Exclusion
Procedure
Several activities such as valve packing and pump
repacking are NOT considered as opening of a
component or system.
 Also, some activities are exempt from the FME
requirements under certain conditions.

Review SPP 6.5, Section 2.0 for more examples of
the above.
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Foreign Material Exclusion
TERMS AND DEFINITIONS
The following
definitions from
SPP 6.5 are
important and
are found in
Section 5.0
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Foreign Material Exclusion - Preventing the
inadvertent introduction of foreign material, such
as dirt, debris, maintenance residue, tools and
equipment into open plant systems or
components.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

FME Area - A work area
where specific controls are
implemented to prevent
the introduction of foreign
material into systems or
components during the
performance of
maintenance,
modifications, test or
inspection activities.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Maintenance Residue - Any by-product of a
maintenance activity, such as chemical deposits
from solvents, particles and filings from cutting,
grinding or lapping dust, wood chips from
scaffolding, tape adhesive, and welding or
soldering residue.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Source Term - The
quantity of radioactive
materials (corrosion
products and fission
products) contained in
the Reactor Coolant
System (RCS).
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Fail-Safe - Describes
an item which is too
large to fit through the
sensitive openings in
systems, components,
or equipment.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Fail Safe (cont.) - Component parts of the item
must be secured to prevent loss and the item
must be easily retrieved from the system or
component.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Fail Safe (cont.) - During
refueling activities, in the
area of open pools of
water, an item may be
considered fail-safe if the
configuration of the item
makes it readily
retrievable, even though it
is small enough to fit
through available system
openings.
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Foreign Material Exclusion
TERMS AND DEFINITIONS
 Qualified
FME
Monitor (FMEM) - A
person who has had
training concerning
FME procedures and
controls, duties of
FMEM, and actions to
be taken should loss or
suspected loss of FME
control occur.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

The FMEM must be knowledgeable of
– FME requirements,
– use of accountability logs,
– their responsibility to remain at or near the entrance to
FME control area,
– the logging in and out of items and/or personnel,
– and verification (accountability) for all items before
closure or removal of boundaries/barriers.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

FME Accountability Log - A chronological
listing used to account for items and personnel that
enter and exit FMEAs.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Temporary Cover - A method to cover and
protect a system or component from the
introduction of foreign material when the system
or component is left unattended.
SPP 6.5 has several specific requirements for
temporary covers.
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Foreign Material Exclusion
TERMS AND DEFINITIONS
Lanyard - A line, rope or cord used to secure or
restrict an object from movement or loss.
Lanyards should be made of nylon or corrosion
resistant steel wire. The shortest length should be
such that it minimizes dropping distance and
limits the object from hitting and damaging
surrounding equipment.
In no case shall a personnel hazard be caused to
exist by the use of lanyards!

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Foreign Material Exclusion
TERMS AND DEFINITIONS

Non-fail-Safe Describes an item
which could be
introduced into
sensitive openings of
systems or
components.
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Foreign Material Exclusion
TERMS AND DEFINITIONS

Non-fail-Safe (cont.)- This introduction could
occur by the item itself falling into or part of the
item falling into the openings.
Can you think of a Non-fail-safe item where part of
the item could fall into openings???
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Foreign Material Exclusion
TERMS AND DEFINITIONS
For example: a lens holder comes off a flashlight,
allowing batteries, lens and holder to fall into an
open system or component.
 This type of item is considered nonfail-safe, and
shall require additional methods, such as lanyards,
taping, and bagging to prevent loss.

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Foreign Material Exclusion
Work Steps
Work Planning
Work Preparation
HPT001.113
Work Performance
40
Work Planning
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Foreign Material Exclusion
Work Planning



A FME evaluation for controls should be
performed whenever a system or component is to
be opened. This evaluation is typically performed
by the work planner.
For standard, recurrent activities in which FME is
required, a mandatory FME list and standing
instructions concerning FME controls
(requirements) should be developed.
An example is SPP 6.5, Appendix F, BFN Spent
Fuel Pool, Vessel Cavity, and Equipment Pit - Level
3
Appendices B - G contain other BFN
requirements.
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Foreign Material Exclusion
Work Planning
 More
stringent FME requirements may be
mandated for any work activity than is
listed in the Appendices of the SPP.
– Especially important for work on valves which
have stellite hard-facings and where particles
could come in contact with reactor coolant.
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Foreign Material Exclusion
Work Planning
 Less
stringent controls must be approved
by the FME Program Coordinator or
designee.
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Work Preparation
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Foreign Material Exclusion
Work Preparation

Work Supervisor Responsibilities:
– Brief the work crew(s)
– Assign qualified FME monitor
– Define FME area boundaries to be established

Worker Responsibilities:
– Establish boundaries and markers
– Remove nonessential material from the FMEA/adjacent areas
– Clean the FMEA (including overhead and components) of dirt and
debris
– Erect a clean enclosure or barrier around the FMEA
– Make all items fail-safe
– Remove unsecured personal items (jewelry, wallet, coins, etc.)
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Foreign Material Exclusion
Work Preparation

FME areas must be
bounded and marked.
STOP
DO NOT REMOVE
WITHOUT AUTHORIZATION
OF
Work Supervisor
Phone #
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Foreign Material Exclusion
Work Preparation

The STOP sign and
these FMEA boundary
postings (or similar
ones) are used.
FOREIGN MATERIAL
EXCLUSION AREA
AUTHORIZED PERSONNEL
ONLY
FOREIGN MATERIAL
EXCLUSION AREA
AUTHORIZED PERSONNEL
ONLY
FME MONITOR APPROVAL
REQUIRED
BEFORE ENTRY
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Foreign Material Exclusion
Work Preparation

FME Monitor Responsibilities
– Perform and document an initial
inventory of all non-permanent
items that are not fail-safe within
the FMEA using an approved
FME Accountability Log.
– Concurrence must be obtained
from the job supervisor.
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Work Performance
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Foreign Material Exclusion
Work Performance

Work Supervisor Responsibilities
–
–
–
–
–
–
Ensure work preparation steps are complete
Authorize system or component opening
Monitor work area
Ensure logs are reconciled and approved
Ensure FMEA cleanliness
Designate an individual to witness closure of
the system
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Foreign Material Exclusion
Work Performance
 FME
Monitor Responsibilities
– Maintain required access controls to FMEA
and records for material accountability
– Ensure personnel understand requirements
and comply with FME controls
SPP 6.5, Sections 3.3.5, and 3.3.6, contain
many more specific requirements for both
the above responsibilities.
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Foreign Material Exclusion
Work Performance

Some examples are:
– Log all missing items or parts from tools and
equipment entering the FMEA. Video taping or
photographing items is an option.
– Log all tools, equipment, and material that enter and
exit the FMEA
– Inspect tools, etc., exiting the FMEA for missing parts
that might have been lost in the FMEA.
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Foreign Material Exclusion
Work Performance
 Control
of Materials Entering FMEAs
– Tape shall be placed over all pocket openings
containing items/material.
– Pens and pencils shall be attached to a lanyard.
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Foreign Material Exclusion
Work Performance
 Control
of Materials Entering FMEAs
(cont.)
– Loose objects such as badges and dosimetry
shall be worn under protective clothing or
placed in a pocket and taped, even if attached to
a lanyard.
– Electronic dosimeters are considered secured if
placed inside the pocket with the retaining clip
over the pocket and taped.
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Foreign Material Exclusion
Work Performance
 Control
of Materials Entering FMEAs
(cont.)
– Items of jewelry, such as earrings, wrist
watches, rings and necklaces shall be removed
or placed in taped pockets. However, rings
which cannot be removed, and rings and
watches covered by gloves shall be considered
fail-safe.
– Eyeglasses shall be fastened to the wearer with
tape, nylon cord, or eyeglass retainer straps
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Foreign Material Exclusion
Work Performance
 Worker
Responsibilities
– Examine all items before entry and before
removal to identify and correct any loose or
missing parts
– Use good work practices to minimize
maintenance residue generated during the
activity.
– Ensure parts/particles, especially valve stellite
hard-facing, are removed before closure.
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Foreign Material Exclusion
Work Performance
 Examples
of Good Work Practices
– Ensure that the external surface of the component to be worked is
free of foreign material that could enter the system when opened.
– Inspect and clean the work area if required before starting work
including the area above the work area and ensure no loose items
exist which could fall in the system while open. Remove or secure
items that could fall in the system.
– Clean any new components or parts of protective coating or dirt
before installation.
– Use only approved chemicals.
– Ensure all tools or components entering the FMEA that have loose
or missing parts are identified on the accountability log.
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Foreign Material Exclusion
Work Performance
 Examples
of Good Work Practices (cont.)
– Visually inspect system internals for foreign material immediately
after opening. If foreign material is found, notify job supervisor
and FMEM if applicable.
– As work progresses, inspect system internals that will be
inaccessible after further assembly.
– Ensure system cleanliness before final closure.
– Be responsible for items taken into FME areas, ensuring items
being carried in are logged in and out on exit when required.
– Clean up as work progresses, rather than rely on large clean-up
when the work is completed.
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Foreign Material Exclusion
Work Performance
 FME
areas are classified as:
Level 1 - FME General Housekeeping
Level 2 - Systems/Components in which the
opening is small, or all areas can be visually
inspected and foreign material removed.
Level 3 - Systems/Components in which all areas
cannot be visually inspected and foreign
material removed.
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Foreign Material Exclusion
Work Performance
 SPP 6.5, Appendices
contain requirements
for specific activities for Levels 1, 2, and 3
and are listed by system for BFN and
PWRs.
 Appendix G gives guidance for BFN Refuel
Floor FME controls.
 Appendix H gives requirements for BFN
Torus and Drywell activities.
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Foreign Material Exclusion
Work Performance
Appendix I gives guidance at PWRs, Reactor
Equipment Pit with Head in Place.
 Appendix J gives guidance at PWRs, around Spent
Fuel Pit, Cask Loading Area, Transfer Canal and
Refueling Cavities when flooded.
 Appendix K gives guidance at PWRs, Control of
Loose Debris in Ice Condenser, Modes 5, 6 and
No Mode.

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Foreign Material Exclusion
Suspension of the Job
 Often
plant conditions change
which requires work within a
FMEA to be suspended. If work
in a FMEA is stopped during a
shift, between shifts, or for a
period of time certain actions
are required.
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Foreign Material Exclusion
Suspension of the Job
 If
work on a job will be interrupted for normal
breaks, meals, shift turnovers, or work related
activities, the Lead Work Performer or Job
Supervisor shall ensure the following conditions
are met:
– Work location must be secured with appropriate
temporary covers, plugs, or other barriers.
– To extent practical, unneeded tools, equipment,
supplies, material, and debris are removed and general
housekeeping requirements are met.
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Foreign Material Exclusion
Suspension of the Job

The Job Supervisor
may relax the FME
requirements when
work is interrupted for
longer than one shift,
provided the following
conditions are met:
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Foreign Material Exclusion
Suspension of the Job



Ensure all personnel are out of the area.
A “Stop” sign should be posted at the entrance to require
all individuals who enter the area to contact the job
supervisor before entering the area. FME boundaries may
be removed if “Stop” signs are placed on the temporary
covers.
When FME boundaries remain ensure temporary signs are
maintained to clearly identify the FME area and the
responsible supervisor to be contacted for entry into the
area.
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Foreign Material Exclusion
Suspension of the Job

Temporary plugs, covers or seals should be substantial and
compatible with the application. Examples:






metal or plastic disks.
pipe plugs,
blind flanges,
heavy gasket material
herculite
Covers should be fire resistant or fire retardant to the extent
possible.
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Foreign Material Exclusion
Suspension of the Job

Paper products or rags
inserted into openings are
unacceptable for use as
temporary plugs or covers.
HPT001.113
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Foreign Material Exclusion
Recovering from Loss of FME Controls Worker Responsibilities:
If a known or suspected
instance of entry of
foreign material into an
open system or
component should occur,
the worker(s) shall
immediately take action.
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Foreign Material Exclusion
Recovering from Loss of FME Controls Worker Responsibilities:

work
 Notify:
FME monitor
Job supervisor
HPT001.113
Shift Manager or RFF
Senior Reactor Operator
as appropriate.
70
Foreign Material Exclusion
Recovering from Loss of FME Controls Worker Responsibilities:
 If
an item can not be
accounted for on the
inventory log, the
worker shall notify his
job supervisor.
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Foreign Material Exclusion
Recovering from Loss of FME Controls Worker Responsibilities:
 If
the material can be
easily retrieved (without
further disassembly of the
system or component) then
the retrieval may be
performed and documented
on existing work initiating
document.
HPT001.113
Caution
Radioactive
Material
72
Foreign Material Exclusion
Recovering from Loss of FME Controls
Caution Radioactive Material!
Do not remove foreign material without first
having the material surveyed by RADCON!
 Unplanned radiation dose events have occurred
because workers handled foreign material that
was highly radioactive.

HPT001.113
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Foreign Material Exclusion
Recovering from Loss of FME Controls Work Supervisor Responsibilities
 If
the missing items cannot be accounted
for, the job supervisor shall determine if
work should be stopped and the item
retrieved or if the search and retrieval will
be performed just before closure.
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Foreign Material Exclusion
Recovering from Loss of FME Controls Supervisor Responsibilities
10 CFR 50.59
 A PER
will be initiated
for items which cannot
be retrieved immediately.
Problem Evaluation Report
(PER)
 Safety
and technical
evaluations will be
performed as appropriate.
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Foreign Material Exclusion
Completing Job Closeout
 Before
a system opening is closed:
–
–
–
–
–
All PERs identifying FME must be evaluated
The system determined acceptable for closure
Closeout inspection performed and documented
Any FME concerns resolved, documented on PER
Workers remove all materials, debris, tools, and
equipment.
– Initiate corrective actions for inadequate FME controls
– Provide feedback to work planner on problems or good
practices
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Foreign Material Exclusion
Training Requirements

General and specific training shall be
conducted for:
– All personnel with access to plant work areas for a
general knowledge of FME.
– Engineers, supervisors, technicians, operators,
planners.
– FME monitors, foremen, craftsmen, contractors.
– A list of qualified FME monitors will be
maintained by Site Training.
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Foreign Material Exclusion
Periodic Assessment
 The
Site FME
Coordinator should
periodically perform
an assessment of how
well the FME program
is working.
This
would involve review
of such items as work
documents and PERs
concerning loss of/or
suspected loss of FME
controls.
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Foreign Material Exclusion
Periodic Assessment
 Trends
will be
reviewed and any
corrective
measures should be
implemented.
100
80
60
40
20
0
HPT001.113
1st 2nd 3rd
Qtr Qtr Qtr
4th
Qtr
79
Foreign Material Exclusion
Common Causes of FMI
****Identified by INPO****

Insufficiently established and communicated
management expectations for the implementation
of FME controls.
 Limited supervisory emphasis on FME
considerations and practices during pre-job
briefings and monitoring of work.
 Insufficient training for workers in basic FME
practices and a lack of specific training for work
activities involving specialized activities of key plant
systems.
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Foreign Material Exclusion
INPO Recommendations
Provide clearly established management
expectations for foreign material
exclusion controls and practices.
 Verify the work control process reinforces
FME controls.
 Ensure initial, continuing and jobspecific training programs provide the
knowledge and skills needed to
implement effective FME practices.

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Foreign Material Exclusion
SOER 95-01

On August 29, 1994, at Pilgrim, a main generator fault
caused a load rejection that resulted in a reactor scram
from 100 % power. The fault resulted from overheating of
stator bar insulation. The overheating has been attributed
to foreign material restricting flow of the stator cooling
water outlet header. Imprints in one piece of the gasket
material indicate that the material may have covered as
much as 80 % of the outlet flow area from the most
severely damaged stator bar.

The unit was shutdown for 14 weeks.
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Foreign Material Exclusion
SOER 95-01

At Biblis A, 1994, during preparations for
plant restart following a refueling outage, a
fire occurred in the motor of a reactor coolant
pump as a result of a short circuit in the motor
windings. When the motor was inspected, a
chisel, left in the motor during a previous
motor inspection, was found to have caused
the short circuit.

Plant restart was delayed for approximately
one month.
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Foreign Material Exclusion
SOER 95-01

Robinson 2
– On October 10, 1992, parts from a refueling tool came loose and
lodged in the control rod guide tube of a fuel bundle. The next
day, contractors who performed the work noticed parts were
missing, but they did not report this to their supervisor or to station
personnel. 18 hours later, the contract personnel informed their
supervisor that the missing parts were at the bottom of the spent
fuel pool. Their supervisor thought this was of limited significance
and did not report it to station personnel. One hour later, a control
rod would not fully insert into a fuel bundle, station personnel were
informed that missing tool parts might be the cause. Visual
inspection of the control rod revealed one of the missing parts
stuck to the end of the control rod. The other parts remained in the
guide tube of the affected fuel bundle.
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Foreign Material Exclusion
SOER 95-01

Milhama 1, 1993 - A turbine overspeed trip test
was performed on the main turbine. During this
test which followed a refueling outage, bearing
lube oil pressure was 14 psig instead of the normal
24 psig at rated turbine speed. The reactor was
shut down and investigation revealed that the
bearing oil pump ejector nozzle was found clogged
with paper towels that had been used to wipe the
main oil pump flanges.

The plant was off-line for an additional 6 days.
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Foreign Material Exclusion
SOER 95-01


Perry 1, 1992/93 - During a refueling outage debris was
found on the suppression pool floor and on the suction
strainers for 2 RHR pumps. The strainers were replaced in
a future outage due to deformation from excessive
differential pressure caused by debris on the strainers.
Additionally, filter media for 3 large air filters in the
drywell air coolers, used to provide filtered air in the
drywell during plant outages, was determined to be the
source of fibrous material found coating the suction
strainer during another outage.
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Foreign Material Exclusion
SOER 95-01



Dresden 3, 1993 - A reactor scram occurred due to flow
restriction in the high-pressure section of the main turbine.
A bolt, slugging wrench, and key stack that fit together to
form a tool had been left in the main steam piping during a
previous outage.
These parts caused extensive damage to the first-stage
turbine rotor and stationary diaphragm blades. The blading
deformation partially blocked the steam flow.
A two-month forced outage was required to repair the HP
turbine.
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Foreign Material Exclusion
SOER 95-01

Hatch 2, 1992 - Fuel sipping identified failed fuel
bundles. Inspection revealed debris in 102 of the
bundles. Some of the bundles were damaged from
ferrous metal chips from machining activities
performed on primary system piping during the
previous refueling outage.
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Foreign Material Exclusion
SOER 95-01

Point Beach 2, 1992 - A foam rubber plug was
found blocking a containment spray pump. The
plug had been installed in the piping for cleanliness
control during modification work that installed full
flow test lines in the containment spray, RHR, and
safety injection systems during a previous outage.
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Foreign Material Exclusion
SOER 95-1
 Many
of these
events caused
delays in restart of
a unit, or forced
outages to repair
damage to the
plant.
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Foreign Material Exclusion
WBN Event NRC Inspection Report No. 50-390/97-11

On September 20-21, 1997, with the reactor defueled, a
rad-worker noted four, small foreign objects lying on the
reactor vessel flange. Because of his concern for FME
(Error Precursor – “Can-do” attitude), the rad-worker
placed three pieces of the material in a plastic bag without
having the appropriate radiation survey conducted and
subsequently removed the bag from the reactor vessel
cavity area.
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Foreign Material Exclusion
WBN Event NRC Inspection Report No. 50-390/97-11


(cont’d)
One piece of foreign material
was later determined to have a
contact reading of 56 Rem/hour.
Calculations indicate that the
worker received 3.645 Rem to
his hand or about 7% of the
NRC annual extremity limit of
50 Rem.
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Foreign Material Exclusion
OE 9543



While preparing to install a new Low Pressure Stop Valve
on the 2B Reactor Feed Pump, workers disassembled a
NEW valve to inspect for foreign material and found a
handfull of metal shavings and grease inside the valve near
the plug and seat area.
This foreign material was not visible prior to disassembly
of the valve. The workers removed all foreign material
from the valve and then installed the valve successfully.
If the workers had not removed this foreign material, it
could have been introduced into primary plant systems
resulting in possible fuel and component damage.
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Foreign Material Exclusion
OE 9543

The root cause of this incident is:
– Less than adequate foreign material intrusion
controls by the equipment supplier.
– The equipment supplier has since instituted
final inspection requirements to prevent a future
incident of this type.
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SUMMARY

During past years, foreign material intrusion events have
occurred with an increasing frequency resulting in the
following:
–
–
–
–
–
–
–
–
nuclear fuel cladding damage
major equipment damage
heat transfer capability degradation
increased radiation levels
increased presence of discrete radioactive particles
increased radwaste generation
system flow characteristics degradation
unscheduled plant outages and outage extensions
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Summary
 All
employees must maintain an awareness
of Foreign Material Exclusion during
maintenance activities and especially during
an outage.
TVAN
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 Examination
Instructions-
 Your
examination must be proctored.
 You may review the course as much as you
wish before taking the test.
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Exam Ground Rules





No communication, except between student and proctor.
No reference material other than SPP-6.5 is permitted during
testing.
All answers given are to be your own, and you are not to receive
assistance on the exam, nor are you to provide assistance to
another student on the exam.
Violations of exam integrity will result in disciplinary action.
By entering the exam and requesting a proctor code, you are
attesting that you understand and will comply with the exam
rules.
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FOREIGN MATERIAL EXCLUSION

We need your feedback on this course. Please
obtain a feedback form, complete, and mail it to
Brian Fike, BFT 2A, BFN.
Thank you!
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FOREIGN MATERIAL EXCLUSION
You may press escape to go back to the main
menu to take the test.
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