ML20128L752
| ML20128L752 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/21/1985 |
| From: | Grimes B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Opeka J NORTHEAST NUCLEAR ENERGY CO. |
| Shared Package | |
| ML20128L757 | List: |
| References | |
| NUDOCS 8507110452 | |
| Download: ML20128L752 (7) | |
See also: IR 05000423/1985029
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555
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Docket No. 50-423/85-29
JUN 21 190
Mr. J. F. Opeka
Senior Vice President
Nuclear Engineering and Operations
Northeast Nuclear Energy Company
P.O. Box 270
Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
Subject: Millstone 3 Engineering Assurance Program (EAP) Technical
Audit Preparation Inspection Report 50-423/85-29
This letter conveys the results and conclusions of the inspection of review
plans for the Northeast Nuclear Energy Company's (NNECO) EA Technical Audit
(Ref. " Program for Completion of the Engineering Assurance In-Depth Technical
Audits of Millstone Unit 3 Project" dated February 19, 1985 with Revision
2 dated May 23,1985). The inspection was conducted by the NRC's Office of
Inspection and Enforcement.
The team was composed of personnel from NRC's
Office of Inspection and Enforcement, and consultants. Also present were
representatives from Region I and the Office of Nuclear Reacter Regulation.
"
The inspection took place at the Stone and Webster Engineering Corporation
(SWEC) Boston, Massachusetts from May 28, 1985 to May 29, 1985.
The NRC's inspection of the EA Technical Audit preparations for Millstone Unit
No. 3 was organized into the five major disciplines involved; viz, mechanical
systems, mechanical components, civil / structural, electric power and
instrumentation and controls.
In each of these areas, the NRC inspectors
concentrated on the preparations of SWEC review plans to implement the proposed
EA Technical Audit. khere warranted, the NRC reviewed the resumes and
certifications of the NMPC/SWEC audit teams.
As a result of the inspection, the NRC Inspection Team concluded that the
preparations and approach for the upcoming audit were in most cases in
accordance with the approved program plan and were in sufficient technical
depth to achieve program objectives subject to the following general comments:
The Engineering Assurance program is not addressing the design process
employed to analyze and resolve seismic interactions. We understand that
your approach in this area of design is similar to that used on SEP plants,
relying heavily on walkdowns to determine adverse seismic interactions.
We further understand that the acceptance criteria used in the walkdowns
is based on experience gained through the study of earthquake damage
caused in various industrial facilities. This approach is unique and
deviates from the normal manner that the seismic interaction question
has been typically addressed on other NTOL plants. We have brought this
issue to the attention of the Office of Nuclear Reactor Regulation for
8507110452 850621
ADOCM 05000423
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Mr. J. F. Opeka
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their review as it constitutes a potentially open licensing issue. We
understand the final SWEC EAP report will not be able to reach a conclusion
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regarding that portion of the design process addressing seismic interactions.
This will be maintained as an open issue in our EAP review pending advice to
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IE by the Office of Nuclear Reactor Regulation on this aspect of design.
,
Instances were observed where EA auditors appeared to have intended to
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accept SWEC procedures without further review against design requirements
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The attributes to be assessed in some review plans need modification or
augmentation to provide for a sufficiently in-depth review.
For example,
the calculation review plan (1903-1) where used in pipe stress analysis
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doesn't consider flexibility of in-line components, confirmation of
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assured pipe support stiffness, or equipment flexibility at anchors and
the Engineering and Design Coordination Report (E&DCR) Review Plan
attributes are limited to the adequacy of the problem description and
solution stated on the E&DCR's. As such it does not consider the complete-
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ness of the problem posed including whether proper inteidiscipline
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coordination has been addressed.
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The significance of calculations solicited for review needs to be improved
in some cases. Also, where partial calculations are critical to the particular
review, calculation review sheets were not being prepared. Finally, the
calculation review plan does not address open assumptions which need later
verification nor the appropriateness and validity of computer codes used
in the calculations.
Audit of the NSSS interface was not accounted for in the electric power and
I&C disciplines.
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The following deficiencies in audit scope were noted:
(1) Civil / Structural Discipline
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Following an accident the heated containment liner will be rapidly
cooled by the actuation of the recirculation spray system (RSS).
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Therefore, it seems appropriate that the expansion and contraction of
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the containment liner plate during operation of the RSS be reviewed.
This was not being done.
In addition, the seismic analysis which
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developed the RSS equipment seismic specification was not being
reviewed.
(2) Electric Power
Containment penetration assemblies, circuit breaker coordination and
vendor documents for motor control centers, batteries, and battery
chargers were not being reviewed.
The NRC inspection team has been informed that corrective actions on all the
above items are diready in process by the EA Audit Team.
Specific comments of
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the NRC inspection team are provided in the enclosed Preparation Inspection
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Report 50-423/85-29. A fonnal response to this Inspection Report is not
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required.
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Mr. J. F. Opeka
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The program improvements that have been taken or are planned by SWEC on the
items covered in this inspection report will be reviewed by NRC during the
Implementation Review at the Millstone Unit No. 3 Site.
Sincerely,
)
w A.
nA
Brian K. Grimes, Director
Division of Quality Assurance, Vendor,
and Technical Training Center Programs
Office of Inspection and Enforcement
Enclosure:
Preparation Inspection Report
cc: See next page
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Mr. J. F. Opeka
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cc:
Gerald Garfield, Esq.
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Day, Berry & Howard
City Place
Hartford, Connecticut 06103-3499
Mr. Maurice R. Scully, Executive
Director
Connecticut Municipal Electric
Energy Cooperative
268 Thomas Road
Groton, Connecticut 06340
Robert W. Bishop, Esq.
Corporate Secretary
Northeast Utilities
Post Office Box 270
Hartford, Connecticut 06141
Mr. T. Rebelowski
Senior Resident Inspector Office
U.S. Nuclear Regulatory Commission
Millstone III
P.O. Box 615
Waterford, Connecticut 06385
Mr. Michael L. Jones, Manager
Project Management Department
Massachusetts Municipal Wholesale
Electric Conpany
Post Office Box 426
Ludlow, Massachusetts 01056
Regional Administrator
U.S. NRC, Region !
631 Park Avenue
King of Prussia, Pennsylvania 19406
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Mr. Karl Abraham
Public Affairs Office
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U.S. Nuclear Regulatory Commission,
Region !
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King of Prussia, Pennsylvania 19406
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June 24,1985
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Charles E. Norelius
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