ML20059N025

Forwards SER & Technical Evaluation Rept Re Station Blackout Analysis for Plant

ML20059N025
Person / Time
Site:	Millstone
Issue date:	09/27/1990
From:	Vissing G Office of Nuclear Reactor Regulation
To:	Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO.
Shared Package
ML20059N026	List: ML20059N025 ML20059N027
References
TAC-68567, NUDOCS 9010090041
Download: ML20059N025 (3)

Text

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- UNITED STATES e

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' NUCLEAR REGULATORY COMMISSION

'S-wasw m oron,p.c. noses l

September-27, 1990

' Docket No.;50-336l 3

Mr. Edward J. Mroczka c

u Senior Vice-President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Northeast Nuclear. Energy Company P. O.' Box 270:

Hartford, Connecticut 06141-270

SUBJECT:

SAFETY EVALUATION OF STATION BLACK 0UT ANALYSIS FOR MILLSTONE, UNIT NO._2 (TAC 68567)

The Station Blackout (SBO) Rule requires licensees to submit information as :

defined in 10 CFR 50.63 and to provide a plan and schedule for confonnance to the 580 rule. -Your response,to the SB0 rule was provided by letters dated

' April-17,~and May 30, 1989 and March 30, 1990.

Your response has been reviewed by the NRC staff and by Science Applications-f International Corporation (SAIC) under contract to the NRC.

In addition, a-site audit was performed by a joint NRC/SAIC team' headed by a NRC staff member on July 18-21, 1989. -The results of the staff reviews are discussed in the enclosed Safety Evaluation (SE) and the SAIC Technical Evaluation Report-

.(TER) SAIC-89/1155, " Millstone Unit 2, Station Blackout Evaluation," dated July 18, 1990 (Attachment 1 of SE).

We have determined that your response and proposed method of dealing with an l

SB0 is acceptable.

However, the crosstie (14H bus) and cross connecting 4

cables should be modified in accordance with the guidance of Regulatory Guide (RG) 1.155 and NUMARC 87-00, Appendix B (items 3, 9, and 12) to ensure the

. operability of the' Alternate AC (AAC) source and.its components.

3 t

L l Also. the following. areas may require follow-up' inspection by the NRC to l verify D

that the implementation of any modifications and the supporting documentation-which the licensee may propose as a result of this evaluation-are adequate to meet-the Station Blackout Rule.

Inspection guidance for this is being developed.

L a.'

Hardware and procedural modifications, b.

SB0 procedures in accordance with RG -1.155, Position 3.4, l'

and NUMARC 87-00, Section 4, c.

Operator staffing and training to follow the identified actions I

in the SB0' procedures, 9010090041 900927 ADOCK 0 %

I PDR P

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. Mr. Edward J. Mroczka -

2-

_ september 27, 1990 d.

-EDG reliability program meets, as a minimum the guidelines of

(

RG 1.155, F

e.

Equipment and components required to cope with'an SB0 are F

incorporated in a QA program that meets the guidance of RG 1.155, g

Appendix A, and f.

Actions taken pertaining to the specific recommendations noted in the SE.

TheguidanceprovidedonTechnicalSpecifications-(TS)foranSB0statesthat J

the TS should be consistent with the Interim Commission Policy Statement on Technical Specifications. The staff has taken the position that TS are-required s

- for SB0 response equipment. However, the question of how specifications for the SB0 equi) ment.will be a) plied are currently being considered generically by the NRC in t1e context of tie Technb:a1 Specification Improvement Program'and remains an open item at this time.

In the interim,-the staff expects plant

'l procedures to reflect the a)propriate testing and surveillance requirements to s

ensure the-o)erability of tie.necessary SB0 equipment.

If the staff later determines t,1at.TS regarding the SB0 equipment is warranted, the licensee will be notified of the implementation requirements.

As this constitutes our notification of our evaluation of your SB0 analysis,

-i please provide us your schedule for completing the implementation of modifications, procedures and training for SB0 at Millstone, Unit No. 2, a

within 45 days from receipt of this letter.

Sincerely, L

/s/

Guy S. Vissing, Senior Project' Manager Project Directorate I-4 Division of Reactor Projects - I/II i

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Office of Nuclear Reactor Regulation:

Enclosure:

Safety Evaluation cc w/ enclosure:

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Mr. Edward J. Mroczka Milistone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 2 CC:

Gerald Garfield, Esquire R. M. Kacich, Manager Day, Berry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company l

City Placo Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President

-D. O. Nordquist j

Nuclear Operations Director of Quality Services Northeast Utilities Service Company Northeast Utilities Service Company

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Post Office Box 270 Post Office Box 270 i

Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I

'l Department of Environmental Protection U. S. Nuclear Regulatory Commission State-Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Office of Policy and Management Hall of Records 80' Washington Street' 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace,. Nuclear Station Director W. J. Raymond, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U. S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 811 Waterford, Connecticut.06385 Niantic, Connecticut 06357 J. S. Keenan, Nuclear Unit Director Charles-Brinkman, Manager Millstone Unit No. 2 Washington Nuclear Operations Northeast Nuclear Energy Company C-E Power Systems _

.i Post Office Box 128 Combustion Engineering, Inc.

l Waterford. Connecticut 06385 12300 Twinbrook Pkwy Suite 330' Rockville, Maryland 20852