ML20032E981
| ML20032E981 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 11/12/1981 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8111230572 | |
| Download: ML20032E981 (2) | |
Text
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4 THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P.o. Box 5000 m CLEVELAND, oHlo 44101 a TELEPHONE (216) 622-9800 e ILLUMINATING BLOG.
e 55 PUBLIC SoUARE erving The Best Location in the Nation Dafwyn R. Davidson VICE PRESIDENT
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0 6STE M ENGINEER'NG AND CONSTRUCTION
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-t November 12, 1981 V2 01984 T Mr. Robert L. Tedesco l
Assistant Director for Licensing
" Q ag ico, Division of Licensing
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U. S. Nuclear Regulatory Coccission (Q5 q
Washin6 ton, D. C.
20555 Perry Nuclear Ibwer Plant Docket Nos. 50-W O; 50-M1 Response to Reques'. for i
Additional Informaticn -
J Reactor Physics 1
Dear Mr. Tedesco:
4 This letter and its attachment is submitted to provide draft i
response to the concern identified in your letter dated October 30, 1981, in regard to Reactor Physics.
It is our intention to incorporate this response in a subse-quent amendment to our Final Safety utalysis Report.
Very Traly Yours, l
Dalwyn R. Davidson Vice President System Engineering and Construction DRD: mlb i.
Attachment i
cc:
G. Charnoff, Esq.
M. D. Houston NRC Resident Inspector l
f O coOkO-A PDR
491.1 To provide a discussion of the Standby Liquid Control System. -
(4.3.2A)
The discussion should include a curve of the core boron 935 concentration required to shut down the reactor from full power (assuning no control rod motion) at the time in life at which the greatest amount of boron is needed. Any difference, between this curve and values for hot shutdown conditions given in the Table 3.4.3 of NEDE-24222, " Assess-ment of BWR Litigation of ATWS, Volume 1" should be explained.
Response
A discussion of the Standby Liquid Control System is provided in Section 9 3.5 of the FSAR. The system is designed to ensure cold suberitical shut down (70 ) from full power operation. This is the condition requiring the maximum concentration of boron, calculated to be 660 ppm. The value given in Table 3.4.3 of UEDE 24222 of 355 ppm is the amount required for hot shutdown (greater than 0
200 7).
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