ML20055H121

Advises That Encl Review of Cen 387-P, C-E Owners Group Pressurizer Surge Line Flow Stratification Evaluation, Inadequate.Insufficient Bases Provided to Conclude That Power Surge Line Meets Code Limits for 40-yr Plant Life

ML20055H121
Person / Time
Site:	Calvert Cliffs
Issue date:	07/18/1990
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Creel G BALTIMORE GAS & ELECTRIC CO.
Shared Package
ML20055H093	List: ML20055H092 ML20055H121
References
IEB-88-011, IEB-88-11, TAC-72119, TAC-72120, NUDOCS 9007250214
Download: ML20055H121 (3)

Text

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. , UNITED STATES

• y v., .g NUCLEAR REGULATORY COMMISSION 5- , WASHINGTON, D. C. 20656 July 18,1990

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Docket Nos. 50-317' and 50-318 f l

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Mr. G. C. Creel )

Vice President - Nuclear Energy baltimore Gas and Electric Company Calvert Cliffs Nuclear Power Plant MD Rts 2 & 4

• P. O. Box 1535 '

Lusby, Maryland 20657 i

Dear Mr. Creel:

)

SUBJECT:

NRC BULLETIN NO. 88-11. " PRESSURIZER SURGE LINE THERMAL STRATIFICATION" EVALUATION OF COMBUSTION ENGINEERING OWNERS GROUP BOUNDING ANALYSIS RELATING TO CALVERT CLIFFS, UNITS 1 AND 2. TAC 72119 (UNIT 1)

AND72120(UNIT 2)

By letters dated March 3, June 6, and July 31, 1989, Baltimore Gas and Electric Company (BG&E) responded to item 1.b of NRC Bulletin No. 88-11

" Pressurizer Surge Line Thermal Stratification." The letter stated that a t bounding analysis performed by the Combustion Engineering Owners Group (CE0G) is applicable to Calvert Cliffs, Units 1 and 2. It further indicated that the '

integrity of the pressurizer surge line (PSL) satisfies the American Society.  ;

of Mechanical Engineers (ASME)Section III Code criteria for the life of the plant, taking into account the effects of thermal stratification.  ;

i The staff has completed its review of the CEOG bounding analysis and finds

' that although sufficient information has been provided to justify continued plant operation until BG&E completes its final report in accordance with the' ,

schedule delineated by the Bulletin' adequate bases have not been provided for the staff to conclude that the PSL meets all.ap)ropriate Code limits for l 40-year plant life. A copy of the evaluation w11ch was sent to the CEOG is enclosed for your information. Also enclosed is the staff's evaluation of CE's l response to items discussed during a September 1989 audit at CE's office.

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Portions of the enclosed evaluation have been deleted. The deletions are due  ;

to propriatary information included in the Combustion Engineering Report, CEN 387-P, " Combustion Engineering Own n c roup Pressurizer Surge Line Flow Stratification Evaluation." '

l BG8E may work collectively through the CEOG effort to address the issues identified in the evaluation, but BG&E is responsible to-ensure that the i Bulletin requested actions are fully implemented at the Calvert Cliffs i facility.

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i Mr. G. C. Creel -P-The staff will assess the conformance of the PSL to applicable Codes and regulatory requirements for 40-year plant life when the CEOG report regarding '

Item 1.d of the Bulletin is submitted. -

Sincerely, QltiotNAL SloNro ev Daniel G. Mcdonald, Senior Project Mancger Project Directorate I-1 Division of Reactor Projects - I/II OfficeofNucleprReactorRegulation .

Enclosures:

/

As stated cc w/ enclosures:

See next page Distribution:

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7I 30 7[G[qo 1/181 9 DOCUMENT NAME: LTR TO CREEL 72119/72120 I

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e Mr. 4. C. Creel .

Saltimore Gas & Electric Company

.. Calvert Cliffs Nuclear power Diant Cc:

Mr. William Calvert T..Dowen.

County Board ofDreticent Mr. Oostoh W. Walter Comissioners Ergineering Division Drince Frederick, Maryland 20678 Dublic Service Cemission of Maryland American 8vilding 231 E. #altimore Street

0. A. Brune Esc. Saltimore, Maryland 21202-3456 General Counsel 8

61timore Gas and Electric Company D. O. Pox 1475 Ms. Kirsten A. Burger. Esq. ~l Baltimore, Maryland 21203 Maryland Deeple's Counsel American Building, 9th Floor Mr. Jay E. Silberg, Esq, 231 E. Baltimore Street Shaw, Pittman, Potts and Trowbridge Baltimore, Maryland 21202 2300 N Street, NW Washington, OC 20037 Ms. Patricia Birnie Co Director Maryland Safe Energy Coalition Ms. G. L. Adams, ticensing P. O. Box 902 Calvert Cliffs Nuclear Power Plo t Columbia, Maryland 21044 i

MD Rts 2 & 4, p. O. Box 1535 1,usby Maryland 20657 Resident inspector

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c/o U.$. Nuclear Regulatory Comission '

D. O, Dox 437 tusby, Maryland 20657 Mr. Richard McLean Administrator - Radioecology Department of Natural Resources 580 Taylor Avenue Tawes state Office Building DPER 83 Annapolis, Maryland 21401 cegional Administrator, Region i U.S. Nuclear Regulatory Comission 475 Allendale Road King of Prussia, Pennsylvania 19a06 t

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