ML20138J134
| ML20138J134 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/02/1997 |
| From: | Cruse C BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-96-06, GL-96-6, NUDOCS 9705080044 | |
| Download: ML20138J134 (2) | |
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4 Cuuttrs 11. CoosE Baltimore Gas and Electric Company Vice President Calvert Cliffs Nuclear Power Plant Nuclear Energy 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410 495-4455 May 2,1997 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Document Control Desk
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Revision to Commitments in 120-Day Response to Generic Letter 96-06,
" Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions"
REFERENCES:
(a)
Letter from Mr. B. K. Grimes (NRC) to Mr. C.11. Cruse (BGE), dated September 30, 1996, NRC Generic Letter 96-06:
" Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions" (b)
Letter from Mr. C.11. 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" (c)
Letter from Mr. C. II. Cruse (BGE) to NRC Document Control Desk, dated March 6,1997, License Amendment Request: Modification to the 070079 Service Water 11ead Tanks The purpose of this letter is to notify you that we are revising our commitments made in response to Reference (a). In Reference (b), we committed to complete modifications to the Unit 2 Service Water (SRW) System to prevent boiling during all anticipated scenarios. We stated that for Unit 2, we were working on an expedited basis to complete a modification to the SRW System that will provide a means to prevent boiling, by the end of the refueling outage, which started in March 1997.
From the time we received Reference (a), we have continued to work expeditiously to conceive, design, pn, procare, and install the modification to the Unit 2 SRW System. We have now determined that it is
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1 appropriate to revise our commitment. We plan to implement the modification during the next outage of sufficient duration after Reference (c) is approved, but in no eveia later than the end of the 1999 Unit 2 refueling outage. The revision is based on our goal that the modification will meet our expectations for i
ensuring safe, reliable operation of Unit 2. We have completed construction of the modification and plan to perform some testing. We do not plan to complete all testing. Currently, we expect to startup from the outage with the head tanks of the Unit 2 SRW System vented, as described in the Update Final Safety Analysis Report (i.e., the modification will not be implemented to the extent that the head tanks are pressurized).
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We have reviewed the operability determinations we made in support of Reference (b). We have 4
concluded that they are still correct.
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In reference (c), we requested that you approve the requested license amendment by April 10, 1997.
l Based on the above change to our commitment, we are extending our requested date for approval of the
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Umt 2 license amendment request to September 6,1997.
l In Reference (b), we committed to revising the Operating Instruction for refueling pool penetrations l
numbered 59 and 61. We erroneously referred to the Operating Instruction as OI-23H. We should have
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referred to it as Ol-24H. We regret any confusion this error may have caused.
h Should you have questions regarding this matter, we will be pleased to discuss them with you.
j Very truly yours,
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i eW bzV CHC/JMO/bjd cc:
R. S. Fleishman, Esquire H. J. Miller, NRC J. E. Silberg, Esquire Resident Inspector, NRC A. W. Dromerick, NRC R. I. McLean, DNR Director, Project Directorate I-1, NRC J. H. Walter, PSC 1
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