ML20100K513
| ML20100K513 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/05/1984 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-4-202, NUDOCS 8412110155 | |
| Download: ML20100K513 (3) | |
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(412)923-1960 Nuclear Construction Division Telecopy (412) 787-2629 Robinson Plaza, Building 2 Suite 210 Pittsbur0h, PA 15205 December 5, 1984 United States Nuclear Regulatory Commissi-Washington, DC 20555 ATTENTION:
Mr. George W. Knighton, Chief Licensing Branch 3 Of fice of Nuclear Reactor Regulation
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Revised Response to Draf t SER Outstanding Issue 59 (SWS Isolation on Low Header Pressure)
Gentlemen:
Duquesne Ligh:. Company (DLC) s ubmitted information on this issue in letters 2NRC-4-086 of June 20, 1984, and 2NRC-4-141 of September 11, 1984.
Subsequent review of this information by your staf f has indicated that DLC port ion of the Service Water incorrectly described the design basis of a System isolation valve control circuits.
This was due in part to the dual f unct ion of these valves.
The attached revised position is submitted to correct and clarify the information contained in the earlier submittals.
DUQUESNE LIGHT COMPANY By W
E. Q. Woolever Vice President KAT/wjs At t achment Mr. B. K. Singh, Project Manager (w/a) ec:
Mr. G. Walton, NRC Resident Inspector (w/a)
SUBSCRIBED AND SWORN TO BEFORE ME THIS S d DAY OF Ofos/Lo 1984.
Ed Notary Public h2 ANITA ELAINE REITER, NOTARY PUBUC ROBINSON TOWNSHIP, ALLEGHENY COUNTY M8 AD 0
E PDR MY COMMISSION EXPIRES OCTOBER 20,1986 F,
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-Umited Stctco Nuciscr Regulctory Commicaicn Mr. Gecrga W. Knighpn, Chief Page 2' COMMONWEALTH OF PENNSYLVANIA
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COUNTY OF ALLEGHENY
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On this
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day of
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, before me, a Notary Public in and for said Commonwealth and County, personally appeared E. J. Woolever, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne ' Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, _ and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge.
Notary Public ANITA ELAINE REITER, NOTARY PUBLIC ROBINSON TOWNSHIP, ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986 O
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Revise *d' Position on Outstanding Issue 59 of the Beaver Valley Power Station Unit No. 2 Draft Safety Evaluation Report The service water system isolation valves = to the turbine plant component 1
cooling water heat exchangers (2SWS*MOV107A' through D) perform the safety
. function of isolating the safety related portion of the service water system from the non-safety portion in the event of a " CIA" signal. - This portion of the circuitry is designed to IEEE-STD-279-1971_(IEEE-279).
The valves also isolate the safety related portion of the service water. system from the non-safety portion in the event of a. service water low pressure signal.
This-portion f of the circuit does not conform entirely to - IEEE-279 in that-the guidance of. Sections 4.10 (see FSAR Section 7.1.2.4 ), 4.17,' 4.19, and 4.20 are not met.
Since this additional function (low pressure isolation) is not
-a signal "....that cetuate(s) reactor trip..." or a signal "... that,. in the event of a serious reactor accident,. actuate (s) engineered safeguards such as -
co'ntainment isolation...", conformance with' IEEE-279 is not considered ~ to be required.
This portion of - the circuit does, however,-conform with IEEE-279 in areas other than those listed above,
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