ML20064A747
| ML20064A747 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 09/18/1990 |
| From: | Creel G BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-88-17, TAC-69730, TAC-69731, NUDOCS 9009280025 | |
| Download: ML20064A747 (2) | |
Text
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September 18, 1990 E
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.U. S. Nuclear Regulatory. Commission 6-
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ATTENTION:
Document Control Desk 1
SUBJECT:
Calvert Cliffs Nuclear Power Plant
. Unit Nos.1 & 2; Docket Nos. 50-317 & $0-318 1Resnonse to Generic Letter 88-17 (TACs 69730 & 69731)
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REFERENCES:
-(a)L Generic Letter ' 88-17, Loss of Decay Heat Removal," dated L
. October 417( 1988 L
w (b)L 1.e'tter from.Mr. J. A. Tiernan -(BG&E) to. NRC - Document' Controli Desk, dated' January-3.1989, same subject
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h (c)J Letter from Mr.' J. A.:..Tiernan2(BG&E) to NRC Document Control
' Desk, dated January 27, 1989, same subject i
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.. Gentlemen:,
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Genericitetter 88-17 described : concerns and recommended actions forf operation -of the
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Reactor v Coolant System (RCS) and Shutdown Cooling o(SDC) - System - during - reduced i
L, inventory conditions. 'In c response. to the Generic Letter, Baltimore Gas. and Electric
- (BGAE) CompanySimplemented the expeditious actions described in ' Reference (b) and is
=l l implementing ' programmatic enhancements as described in Reference (c). -The programmatic l
enhancements in Reference (c) indicated that BG&E would take - action to submit an j
amendment request. which -would reduce the minimum flow rates; allowed' by Technical LSpecifications in order l to reduce the likelihood of air ingestion into ; the SDC system i
as 3 a Tresult of vortexing. Our intent was to submit that license amendment ' request during April" 1990.
4 Baltimore Gas and ! Electric had previously incorporated reduced SDC flow requirements
~during mid-loop operations at Calvert Cliffs (see Amendment'Nos. 38 and 21 for Units 1-Land.' 2, respectively, from - 1979). Subsequent to the Generic Letter, BG&E' has m
N conducted ivortex ? testing and participated in a Combustion Engineering Owners Group I
-effort to' develop appropriate Technical Specification changes for reducing the shutdown.
cooling flow rate.LThe Owners Group report was received by BG&E in August 1990-and is currently under review for plant-specific implementation.
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-9009280025 900918 i'
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~ September-. 18,-1990 Page 2'
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Our license amendment request is~ now expected to be submitted during October i990.
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. Since Calvert Cliffs has previously - incorporated reduced SDC ' flow ' requirements ' during mid-loopL operations : the proposed: changes will provide increased margin' to vortexing conditions and additional operational-flexibility.
Should - you ' have any questions regarding this matter, we will be pleased to discuss them s
with you.
Very truly yours j
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f GCC/tRG/ dim cc:
D. A. Brune, Esquire J. E.
Silberg, Esquire R. A'. Capra, NRC.
D. G. Mcdonald, Jr., NRC
--T. T. Martin, NRC =,
L. E. Nicholson, NRC '
R. L McLean, DNR; i
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