ML20236J128

Informs That Bg&E Is Not Ready to Respond to NRC RAI Re GL 96-06,but Will Revise Original Response Upon Completion of Reanalysis,Which Will Be in Oct 1998

ML20236J128
Person / Time
Site:	Calvert Cliffs
Issue date:	06/30/1998
From:	Cruse C BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-96-06, GL-96-6, TAC-M96792, TAC-M96793, NUDOCS 9807080057
Download: ML20236J128 (2)

Text

CHARLES H. CnosE Baltimore Gas and Electric Company Vice President Calvert Cliffs Nuclear Power Plant

,' Nuclear Energy 1650 Calvert Cliffs Parkway Lusby Maryland 20657 410 495-4455 June 30,1998 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTESTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Request for Additional Information Related to the Generic Letter 96-06 Response for Calvert Cliffs Nuclear Power Plant (TAC Nos.M96792 and M96793)

References (a)-(g) provide background on the Calvert Cliffs consideration of Generic Letter 96-06 as it applies to this facility. Reference (h) asked for analysis details beyond what had been provided by Baltimore Gas and Electric Company or had been previously asked for by the Nuclear Reguletory Commission.

As expressed in Reference (g), the only remaining concern resulting from the issues raised in Generic Letter 96-06 was water hammer at the containment air coolers. Following the direction given in Supplement 1 to Generic Letter 96-06, we revisited our original analysis of the water hammer event in the Service Water System. The preliminary results indicated that the event would be less severe than originally thought and that plant modifications would not be needed. As we have proceeded with the analysis, new information has developed and is being factored in; as a result, the analysis is not yet complete. There is still no indication that modification to the plant will be necessary and our operability determination is not affected by this new information.

Because the ongoing reanalysis is directly applicable to your questions, we are not prepared at this time to respond to Reference (h). We will revise our original response to Generic Letter 96-06 upon  !/,

completion of our reanalysis, which we expect will be in October 1998. ,/

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Should you have further questions regarding this matter, we will be pleased to discuss them with you.

Very truly yours, for I Charles 11. Cruse Vice President-Nuclear Energy j CilC/EMT/ dim l I

cc: R. S. Fleishman, Esquire 11. J. Miller, NRC J. E. Silberg, Esquire Resident Inspector, NRC S. S. Bajwa, NRC R.1. McLean, DNR A. W. Dromerick, NRC J.11. Walter, PSC

REFERENCES:

(a) NRC Generic Letter 96-06: " Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions," dated l

September 30,1996 '

(b) NRC Generic Letter 96-06, Supplement 1: " Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions," dated November 13,1997 (c) Letter from Mr. C. H. Cruse (BGE) to NRC Document Control Desk, dated January 28,1997,120-Day Response to Generic Letter 96-06, " Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions" (d) Letter from Mr. C. H. Cruse (BGE) to NRC Document Control Desk, dated March 6,1997, License Amendment Request: Modification to the Service Water Head Tanks (e) Letter from Mr. A. W. Dromerick (NRC) to Mr. C. H. Cruse (BGE), dated March 13,1997, Request for Additional Information - Proposed Amendment Regarding Modification to the Service Water liead Tanks (TAC No. M98093)

(f) Letter from Mr. C.11. Cruse (DGE) to NRC Document Control Desk dated, March 26,1997, Request for Additional Information - License Amendment Request: Modification to the Service Water liead Tanks, Unreviewed Safety Question (TAC No. M98093)

(g) Letter from Mr. C.11. Cruse (BGE) to NRC Document Control Desk, dated February 20,1998, Revision to Commitments in 120-Day Response to Generic l Letter 96-06, " Assurance of Equipment Operability and Containment Integrity ;

During Design-Basis Accident Conditions"

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(h) Letter from Mr. A. W. Dromerick (NRC) to Mr. C.11. Cruse (BGE), dated 1 March 20,1998, Request for Additional Information Related to the GL 96-06 Response for Calvert Cliffs Nuclear Power Plant, Unit Nos. I and 2 (TAC Nos. M96792 and M96793)