ML20100K699
| ML20100K699 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/11/1985 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Thompson H Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-5-059, 2NRC-5-59, NUDOCS 8504160031 | |
| Download: ML20100K699 (2) | |
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Nuclear Construction Division Tekcon Robinson Plaza, Building 2, Suite 210 Pittsburgh, PA 15205 April 11, 1985 United States Nuclear Regulatory Cormaission Washington, DC 20555 ATTENTION:
Mr. Hugh L. Thompson, Jr., Director Division of Licensing Of fice of Nuclear Reactor Regulation
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 GNLR 84-08 Appeal Meelfn[ Request and Position Str.tement on the Issue of a Fourth Steam Generator Level Channel
REFERENCE:
DLC letter 2NRC-5-052, dated March 27, 1985 Gentlemen:
This letter is to provide additional information regarding the Fourth Steam Generator Level Channel backfit issue.
On April 1, 1985, the BV-2 Regulatory Affairs Department learned that Mr. F. Burrows (NRR) had requested, through the NRC Senior Resident Inspector for BV-1, that several excess feedwater simulations be conducted on the BV-1 training simulator. The transients were conducted April 2 and April 3,1985.
Due to the timing of the NRC request, DLC requested that the NRC postpone the GNLR 84-08 appeal meeting which had been scheduled for April 4,1985.
During the DLC evaluation of the BV-1 eve nt (prior to submittal of the above reference), two simulations had been conducted on the BV-1 simula-tor.
During that evaluation, DLC had concluded that due to the training rather than engineering design of the simulator no meaningful inferences could be drawn from the simulator results.
On April 2,1985, DLC decided to re-evaluate the validity of the training simulator trans ient s.
Further evaluation of the simulator included plotting a simulator re-creation of the BV-1 event against actual plant data.
The simulator response paralleled the actual ev e nt, except that the magnitude of the simulated pressure decrease was only one-third the pressure decrease in the actual event.
Although the simulator meets design requirements fora training simulato r, the smalle r -
than-actual rate and magnitude of the pressure decrease are significant for excess feedwater events.
Thus, the training simulator is not an engineering simulator and cannot be considered adequate for an engineering evaluation of excess feedwater events.
8504160031 850411 PDR ADOCK 05000412 A
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Unites States Nuclear Regulatory Commission hir. Ilugh L. Thompson, Jr., Director GNLR 84-08 Appeal blecting Request Page 2 DLC reaffirms the position expressed in the above reference that the protection provided for excess feedwater events is adequate.
DLC proposes that the GNLR 84-08 appeal meeting on this issue be rescheduled for either blay 9 or Stay 10, 1985.
DUQUESNE LIGilT C051PANY BY j.
J. Car p V ce President Rh'F/wj s cc: Fir. S. Chesnut, Technical Assistant 51r. 51. Clausen, Technical Assistant Alr.11. Denton, Director NRR 51r. V. Nerses, Proj ect 31anager B!r. T. Novak, Assistant Director
!!r. B. K. Singh, Proj ect blanager Str. J. Tourte110tte, Chairman RRTF 51r. G. Walton, NRC Resident Inspector C051510NWEALTII 0F PENNSYLVANIA )
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COUNTY OF BEAVER
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On this //M day of
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[ [6, before me, a Notary Publi~c in and for said Coinmonwealth and County, personally appeared J. J. Carey, who being duly sworn, deposed and said that (1) he is Vice President of Duquesnt 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.
{ LLfO $ l-6LML Notary Public
$hEllA M. FATTORE, NOTABY PUftlC SHIPPINCPOAT SOR0, HAVER COUNTY MY CONMI55804 EIPIR15 SEPT, !$,1985 Member, Pennsylvania Association of Rottries