ML20138Q293
| ML20138Q293 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 12/03/1985 |
| From: | Shanbaky M, Weadock A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20138Q276 | List: |
| References | |
| 50-245-85-28, NUDOCS 8512270132 | |
| Download: ML20138Q293 (12) | |
See also: IR 05000245/1985028
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U.S. NUCLEAR REGULATORY COMMISSION
REGION I
Report No.
50-245/85-28
Docket No.
50-245
License No. pPR-21
Priority
Category
C
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Licensee: Northeast Nuclear Energy Company
P. O. Box 270
Hartford, Connecticut 06101
Facility Name: Millstone Point Nuclear Power Station, Unit 1
Inspection At: Waterford, Connecticut
Inspection Conducted: November 5-8, 1985
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Inspector:
M.N
/2 /'f/f9 f4'
. Weadock, Radiation Specipilst
dat'e
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Approved by: M.
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M. ~Shanbaky, Chief, PWR Rpflological
'date
Protection Section, EPRPB, DRSS
Inspection Summary:
Inspection conducted on November 5-8, hy (v qction Report No. 50-245/85-28).
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Areas Inspected: Routine, unannounced inspection of radiological controls
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during the current outage, including:
selection, qualification and training,
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internal and external exposure control, surveys, posting and area control, and
ALARA activities. The inspection involved 38 inspector-hours onsite by one
region-based inspector.
Results: One violation, concerning a failure to follow radiation protection
' procedures, was identified (see Section 6.0).
8512270132 851203
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ADOCK 05000245
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DETAILS
1.0 Persons Contacted
B. Adamoski, General Foreman, CN Flagg
D..Bertrand, Maintenance
- M. Brennan, Unit 1 Radiation Protection Supervisor
R. Doherty, Unit 1 ALARA Coordinator
B. Granados, Health Physics Supervisor
- J. Kangley, Radiological Services Supervisor
- J. Laine, Unit 2 Radiation Protection Supervisor
E. Martinez, NES Project Engineer
F. Matovic, Assistant Radiation Protection Supervisor
- W. Romberg, Station Superintendent
P. Simmons, Dosimetry Supervisor
G. Smith, Nightshift Radiation Protection Supervisor
- J. Sullivan, Health Physicist
J. Tyler, Maintenance
R. Villeaux, Radiation Control Manager, CN Flagg
- Denotes those individuals attending the exit interview on
-November 8, 1985.
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Other licensee employees were also contacted during the course of this
inspection.
2.0 Purpose
-The purpose of this routine safety inspection was to review the
implementation of the licensee's Radiological Controls Program during the
current outage. The following areas were reviewed:
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personnel selection, qualification and training,
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posting and area control,
surveys,
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external exposure control,
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internal exposure control,
ALARA activities.
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3.0 Personnel Selection, Qualifications and Training
3.1 Radiation Protection Personnel
The selection, qualification and training of contractor radiation
-protection technicians and support personnel _was reviewed with
respect to the following criteria:
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ANSI-NI8.1, 1971, " Selection and Training of Nuclear Power
Plant Personnel,"
Procedure SHP 4920, " Contracted Health Physics Personnel
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Training Program,"
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Procedure HP #911/2911/3911A, " Health Physics Department
Services Training Program."
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The licensee's performance in this area was evaluated by:
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discussion with supervisory personnel,
discussion with contracted HP technicians and service
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personnel,
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review of selected technician training records and resumes.
Within th'e scope of the above review, no violations were identified.
The insp3ctor noted the licensee's review of HP technician resumes
was generally thorough and evaluated the quality as well as the
duration of technician's previous work experience.
3.2 Radiation Workers
The training of radiation workers was reviewed with respect to the
following criteria:
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10 CFR 19.12, " Instructions to Workers,"
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ACP 8.26, " Radiological Worker Training and Retraining for
Company and Contractor Personnel."
The inspector reviewed training and dosimetry records for contract
workers performing control rod drive (CRD) maintenance and verified
the following:
worker exposure histories were complete,
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workers had received both general employee and specific CRD
removal training.
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4.0 Posting and Area Control
The licensee's posting and control of airborne radioactivity areas, con-
taminated areas, and radiation and high radiation areas was reviewed with
respect to the following criteria:
Technical Specification 6.12, "High Radiation Area"
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10 CFR 20, " Standards for Protection Against Radiation."
.The licensee's performance in this area was reviewed by the following
methods:
inspector tours of the various radiological work and storage areas,
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performance of independent surveys by the inspector.
Within the scope of the above review, no violations were identified.
The various radiological work areas were clearly posted; housekeeping
conditions inside the areas was generally adequate.
5.0 Surveys
The licensee's performance and documentation of radiation and
contamination surveys was reviewed with respect to the following criteria:
10 CFR 20, " Survey,"
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Procedure SHP 4905, " Radiological Surveys."
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The inspector reviewed selected surveys used to generate Radiological
Work Permits (RWPs) or to track radiological conditions during ongoing
evolutions.
Within the scope of the above review, no violations were identified.
The inspector noted that current survey information was maintained on the
status boards at the various radiological work areas.
Surveys were
generally found to contain sufficient information to allow the assessment
of radiological hazards prior to establishing radiological controls.
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6.0 External Exposure Control
The licensee's program for controlling work activities and worker exposure
during the outage was evaluated by:
interviews of the radiation protection supervisor and other selected
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. members of the radiation protection department,
tour of various work areas and review of control point logbooks,
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review of the following Radiation Work Permits (RWPs) and
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procedures:
RWP 4274, Condensor Bay Valve Modifications
RWP 4319, Condensor Bay Hangar Modifications
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RWP 4140, UT Recirc. Risers Pipe Weld
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RWP 4148, Inspect, photograph electrical penetrations
RWP 3950, P.M. Valves 1-MS-14A and 1-MS-6
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RWP 3344, Reactor Disassembly-Containment Head Removal-Set-up for Rx
Head Detensioning
Procedure SHP #4912, " Radiation Work Permit Completion and Flow
Control."
Within the scope of the above review, one violation, concerning a
failure to follow radiation protection procedures, was identified
and is discussed in Section 6.1 of this inspection report.
6.1 Failure to Follow Radiation Protection Procedures
Technical Specification 6.11 requires that procedures for radiation
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protection be established, implemented, and adhered to.
Procedure
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SHP-4912, section 4 requires in part that workers be responsible for
"... reading, understanding, initialing and following RWP instruc-
tions." The inspector reviewed worker compliance with RWPs and
identified the following instance where a work party entered a
radiological area in violation of the written requirements on the
applicable RWP.
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On October 27, 1985, two workers entered and performed work in the
reactor cavity area while signed in on RWP 3344.
RWP 3344 required
particulate-filter respirators be worn; surveys indicated smearable
contamination levels of up to 2 mr/hr i on the walkway.
The workers
were allowed to enter the area without respirators by the area HP
supervisory technician.
This decision was based on the following:
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reactor cavity work areas were periodically wetted to prevent
the generation of airborne activity;
B)
previous and ongoing air samples indicated no airborne activity;
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C)
the scope of the work (installing gaskets in manway hatches) was
not anticipated to generate airborne activity.
The decision to drop the respiratory protection requirements was not
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noted on the actual RWP or documented in the control point log. No
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management review or approval of this decision took place.
At the completion of the job one worker was found to be contaminated
on the face, and was subsequently decontaminated by HP.
Follow-up
whole body counting indicated no detectable intake of radioactive
material. The second worker in the party, although not externally
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contaminated, was determined after follow-up whole body counting to
have sustained an intake equivalent to 8 MPC hours of radioactive
material. The inspector stated that failure to adhere to the
. requirements of RWP 3344 constitutes an apparent violation of T.S.
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Section 6.11 (245/85-28-01).
The licensee indicated that standard station policy when making a
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revision to an RWP is to make a pen and ink correction to the RWP at
the ccatrol point. The inspector noted that controlling procedure
SHP 4912 does not address making on-the-spot revisions to an RWP,
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and consequently a mechanism for making a formal change to an RWP
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and assuring appropriate review does not exist.
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The inspector noted that the controlling RWP in the first instance
cited above (RWP 3344 - Reactor Disassembly - Containment Head
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Removal - Set-up for Reactor Head Detensioning) was written to cover
a major evolution consisting of multiple sub-tasks. The need to
make on-the-spot RWP revisions as mentioned above may stem from the
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consequent too-wide scope of the RWP, with a resultant failure to
address the specific radiological control requirements of the
sub-tasks. This area will be reviewed in a subsequent inspection to
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determine if a generic problem exists with the scope of the
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licensee'sRWPs(245/85-28-02).
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During a tour of the various plant radiological work areas, the
inspector noted additional instances in which workers failed to
follow the requirements listed on the RWP. Specifically, during a
tour of the condenser bay area on November 6,1985, the inspector
determined that a verbal exemption to RWP requirements had been made
for workers by the area HP technician.
Specifically, workers
entering on RWP 4319, which required respiratory protection, were
allowed to perform work without respirators. Additionally, workers
entering the area on RWP 4274, which did not require respiratory
protection, were instructed to wear respirators by the HP technician.
These exemptions were communicated verbally to the workers by the HP
techniciar.; no management review or approval of the exemptions took
place.
The inspector verified by discussion with the area HP
that the change in requirements was based on current survey
information and also noted that no revision to the RWP or documen-
tation of the change had been made.
6.2 Licensee Follow-Up to Personnel Contamination
The inspector determined through discussion with licensee management
that two maintenance workers were externally contaminated and had
intakes of radioactive material equivalent to 5 and 8 MPC-hours,
respectively, on November 4, 1985. The workers were contaminated
while performing preventive maintenance on a Main Steam (MS) valve.
The extent of the intake was calculated based on follow-up whole body
counting.. The two workers signed in on RWP 3950, which required
respiratory protection (filtered respirator) and an air sample to be
taken when pulling the old valve packing. The workers made three
separate entries into the steam tunnel work area:
the first to scope
the work area, the second to grease the valves and remove the packing
retainer nuts, and the third entry to pull the old valve packing.
Respiratory protection was worn during the third entry and an air
sample taken during the packing pull showed airborne concentrations
<0.25 MPC.
Health Physics (HP) investigation into the event indicated that the
contamination and intake occurred during the second worker entry.
The valves were located close to the floor and consequently the
workers were required to lie directly under the valves on the floor
to -remove the packing retainer nuts. Surveys taken prior to and
after this work indicated the floor was contaminated with levels
ranging from 1000-40,000 DPM/100 cm2,
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Early identification of the event was circumvented by the failure of
the workers to follow station Health Physics practices.
Specifically, the two workers:
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Performed only a hand and foot frisk, and not a whole body
frisk, at their second exit from the work area;
2.
Failed to notify HP after identifying they were contaminated at
their third exit from the work area;
3.
Decontaminated themselves by showering in the HP decon room
without notifying HP,
4.
Left the site without informing HP.
Consequently, no assessment
or immediate evaluation of the worker's intake was made at this
time.
The station HP staff first identified a problem on November 5, 1985,
when the two maintenance workers requested whole body counts.
The inspector determined by discussion with the licensee that the
Health Physics Staff members were not aware, while generating the
RWP, that the maintenance work would be performed while lying on the
floor, directly under the contaminatai talves.
Consequently, the
airborne activity generating poter.tf ai ef loosening the packing
retainer nuts was not anticipated, od app ropriate protective
measures were not taken.
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The licensee indicated that specifics dealing with work area con-
ditions, etc., are addressed in the pre-job briefing between the
workers and the area HP technicians. The inspector interviewed the
involved maintenance workers and determined a minimal pre-job brief-
ing was performed, with no discussion as to the specific valve
location or position required to perform the valve maintenance.
Licensee corrective action in the above incident include the
following:
1)
briefing of HP technicians and staff as to the likelihood of
similar problems arising at "high traffic times," such as shift
turnover;
2)
briefing of HP technicians as to the importance of the pre-job
briefing in communicating as to how the work will be performed;
3)
review of frisking techniques and station HP procedures with
the involved maintenance workers.
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The inspector noted that failure of the HP staff to adequately
assess the radiological conditions of the work area, along with the
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subsequent failure by the workers to follow station HP procedure,
constitutesan apparent violation of NRC requirements.
Since the
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licensee recognized the above inadequacies and initiated corrective
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measures, the above incident will be considered a " licensee identi-
fied problem" in accordance with 10 CFR 2, App. C.
To encourage
'self-identification and correction of problems, the NRC Enforcement
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Policy provides for not issuing a Notice of Violation for licensee
identified problems of Severity Level IV or V.
NRC inspection
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activities in a subsequent inspection will focus on evaluating the
adequacy of the licensee's corrective actions in preventing a
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recurrence of the above events (245/85-28-03).
6.3 Dosimetry
The licensee's external exposure control program was reviewed against
criteria contained in 10 CFR 20.202, " Personnel Monitoring." The
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licensee's program during the outage was evaluated by:
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interview of selected dosimetry personnel,
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review of selected exposure records, radiation exposure increase
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authorizations, RWP sign-in sheets, and extremity monitoring
records,
review of selected worker exposure histories,
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review of procedure SHP 4902, " External Radiation Exposure
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Control and Dosimetry Issue."
Exposure history documentation was complete and the licensee was
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found to be complying with procedural requirements. Job specific
extremity dosimetry was assigned as required by selected RWPs.
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Within the scope of the above review, no violations were identified.
7.0 Internal Exposure Control
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The licensee's respiratory protection program, including air sampling and
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MPC hour tracking, was reviewed with respect to the criteria contained in
10 CFR 20.103, " Exposure of individuals to concentrations of radioactive
materials in air in restricted areas."
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The implementation of the licensee's respiratory protection program
during the outage was evaluated by:
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examination of respirator issuance logs and respirator qualification
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records for selected workers;
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review of RWP sign-in sheets, air-sampling records, and MPC
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tracking forms;
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interviews of the personnel responsible for various aspects of the
. program and review of their training;
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review of the following procedures:
SHP 4905 " Radiological Surveys,"
SHP 4931 " Selection and Use of Respiratory Protection
Equipment,"
HP 4932 " Maintenance and QA Program for Respiratory Protection
. Equipment."
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Work party sign-in times and air sampling records indicated that air
sampling was generally being performed as required by various RWPs.
MPC hours were being calculated as required and included in worker
exposure history.
Within the scope of the above review, no violations were identified.
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8.0 ALARA Activities
The licensee's ALARA Program was examined relative to criteria contained
in:
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Regulatory Guide 8.8, "Information Relevantsto Ensuring that Occupa-
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tional Radiation Exposures at Nuclear Power Stations will be As Low
As Is Reasonably Achievable," and
Regulatory Guide 8.10, " Operating Philosophy for Maintaining
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Occupational Radiation Exposures As Low As Is Reasonably Achievable."
The licensee's performance relative to these criteria was determined by
discussions with the Radiation Protection Supervisor, the ALARA Coordi-
nator and staff and review of the following documents:
Procedure ACP 6.02, " Maintenance of Occupational Radiation Exposures-
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ALARA,"
Procedure ACP 6.02A, "ALARA Suggestions / Recommendations,"
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MNPS Unit 1 Refueling and Maintenance Outage ALARA Report - 1984,
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ALARA Projects Status Report Printout dated November 5, 1985.
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The 1985 Unit 1 Outage ALARA organization includes an ALARA Coordinator,
a senior _ technician and a clerk on dayshift and a senior technician on
nightshift. ALARA reviews of specific planned work evolutions are
flagged by two methods:
a)
internal recognition by ALARA of upcoming, high exposure jobs, or
b)
an RWP request with an anticipated exposure estimate of 1 manrem or
greater.
Recent and pending activities of the ALARA group have included the
performance of a recirc piping chemical decontamination in 1984 and
the planned acquisition of an automatic reactor vessel head stud
tensioner/detensioner for the 1987 outage. Performance of the 1984
recirc piping decon benefited several outage tasks and led to an
estimated savings of 1300 manrem.
Major ALARA effort for the current outage included the use of an automated
ultrasonics tester for performing in service inspections on drywell piping.
Unfortunately, mechanical difficulties with this equipment resulted in
increased personnel time in the drywell and offset anticipated manrem
savings.
The inspector reviewed an ALARA computer report detailing actual versus
estimated exposure for ongoing major projects and noted two projects had
exceeded their manrem estimates.
Exposure overrun on the piping in-
service inspection (ISI) project was due to previously mentioned equip-
ment difficulties.
Exposure overrun on the safety relief valve (SRV)
overhaul project was investigated by the ALARA staff and was found to be
due to a conservative calculation of estimated exposure. 'A 1984, post
chemical decon dose rate value for the work area was used in the estimate;
this did not take into account recontamination of the piping and conse-
quent increase in dose rates.
The inspector was concerned with the timeliness of the ALARA group's
review of ongoing projects. Outage activities started on October 26,
1985; however, the above computer report, which provided the ALARA group's
first look at the accruing exposure of various projects, was not generated
until November 5, 1985. The licensee stated that difficulties with the
HELPORE computer system, which stores and tracks all dosimetry / exposure
information, prevented any earlier accessing of exposure information.
The
inspector stated that timely ongoing job-status review is crucial to ALARA
for the early identification and possible elimination of unknown exposure
contributors, and that a contingency method for providing this review
should be developed.
The licensee committed to developing a back-up
job-status review process for situations when the HELPORE computer is not
available.
Licensee effort in this area will be reviewed during a subse-
quent inspection (245/85-28-04).
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9.0. Exit Interview
The inspector met with licensee representatives (denoted in section 1 of
this report) at the conclusion of the inspection on November 8,1985.
The
inspector summarized the purpose, scope and findings of the inspection.
At no time during this inspection was written material provided to the
licensee by the inspector.
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