ML20044B918

Informs That Licensee Response to GL 91-06, Resolution of Generic Issue A-30, Adequacy of Safety-Related DC Power Supplies,Per 10CFR50.54f, Acceptable

ML20044B918
Person / Time
Site:	Calvert Cliffs
Issue date:	03/09/1993
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Denton R BALTIMORE GAS & ELECTRIC CO.
References
REF-GTECI-A-30, REF-GTECI-EL, TASK-A-30, TASK-OR GL-91-06, GL-91-6, TAC-M81423, TAC-M81424, NUDOCS 9303120195
Download: ML20044B918 (4)

Text

.

y

[W t

UNITED STATES -

J j

NUCLEAR REGULATORY COMMISSION 2

W ASHINGTON. D.C. 20556-0001 March 9,1993

.j g;

.3 Docket Nos. 50-317' and 50-318 i

,r Mr. Robert E. Denton Vice President - Nuclear Energy

.f Baltimore Gas and Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-4702

SUBJECT:

RESPONSE TO GENERIC LETTER 91-06, " RESOLUTION OF GENERIC ISSUE A-30,

' ADEQUACY OF SAFETY-RELATED DC POWER SUPPLIES,' PURSUANT TO 10 CFR 50.54f" FOR CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT N0. 1 (TAC NO. M81423) AND UNIT NO. 2 (TAC NO. M81424) i Generic Letter (GL) 91-06 was sent to all power reactor licensees. The generic letter provides the resolution for Generic Issue _ (GI) A-30,' " Adequacy of Safety-Related DC Power Supplies." This generic issue is part of GI-128,

" Electrical Power Reliability." GI-128 includes a total of three related l

issues. The two other parts, GI-48, "LCOs for Class IE Vital' Instrument Buses," and GI-49, " Interlocks and LCOs for Class IE Tie Breakers," are the-1 subject of GL 91-11.

As noted, the specific area of concern ~ of GI A-30 is the adequacy of the safety-related de power in operating nuclear power plants, particularly with regard to multiple and common cause failures.

GL 91-06 required a certified written response be provided to the questions-in Enclosure-1 of the GL to-assure that plant specific maintenance, surveillance, and monitor _ing.

provisions are appropriate and have been implemented. By letter dated i

November 8,1991, Baltimore Gas and Electric Company provided' the information requested.

y-' i '

(

,~;,

b NilC FRE CSUB1 C&PY i

Q 9303120195 930309 i;

L PDR ADOCK 05000317 g

P

-PDR 4

j l 0; I

M Mr. Robert E. Denton March 9, 1993

• t The staff has reviewed your response and finds it meets the reporting requirements set forth in GL 91-06. This completes the staffs activities related to the subject TAC Nos.

Sincerely, Daniel G. Mcdonald, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation cc: See next page f

t l

l

r 3

^Q

+

Mr. Robert E. Denton Calvert Cliffs Nuclear Power Plant Baltimore Gas & Electric Company Unit Nos, I and 2 cc:

Mr. Michael Moore, President Mr. Joseph H. Walter Calvert County Board of Engineering Division Commissioners Public Service Commission of 175 Main Street Maryland Prince Frederick, Maryland 20678 American Building 231 E. Baltimore Street D. A. Brune, Esquire Baltimore, Maryland 21202-3486 General Counsel Baltimore Gas and Electric Company Kristen A. Burger, Esquire P. O. Box 1475 Maryland People's Counsel Baltimore, Maryland 21203 American Building, 9th Floor 231 E. Baltimore Street Jay E. Silberg, Esquire Baltimore, Maryland 21202 Shaw, Pittman, Potts and Trowbridge 2300 N Street, NW Patricia T. Birnie, Esquire Washington, DC 20037 Co-Director Maryland Safe Energy Coalition Mr. G. L. Detter, Director, NRM P. O. Box 33111 Calvert Cliffs Nuclear Power Plant Baltimore, Maryland 21218 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-47027 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 287 St. Leonard, Maryland 20685 Mr. Richard 1. McLean Administrator - Radioecology Department of Natural Resources 580 Taylor Avenue Tawes State Office Building B3 Annapolis, Maryland 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 I

Mr. Robert E. Denton March 9, 1993 The staff has reviewed your response and finds it meets the reporting requirements set forth in GL 91-06.

This completes the staffs activities related to the subject TAC Nos.

Sincerely, Original Signed By:

Daniel G. Mcdonald, Senior Project Manager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION:

Docket File NRC & Local PDRs PDI-1 Reading SVaraa JCalvo DMcDonald CVogan RACapra AJohnson 0Chopra, 7/E/4 WButler CRourk, NLS302 CCowgill, RGN-1 OGC ACRS (10) orritt LA:PDl-1 w PM:PDI-lkh4L D:PDl-1 m,

i NW CVogan e, ',4 c DMcDonald: avl RACapra

~

F DATE

') / /93 o3 / oT93 63 /oT/93

/

/

/ /

0FFICIAL RECORD COPY FILENAME: A:\\CC81423.LTR l