ML20097C690

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Forwards Best Estimate Steam Generator Single Double-Ended Tube Rupture Analysis, (B&W Document 77-1152840-00) for Raised Loop Plant in Response to Generic Ltr 83-10 & TMI Item II.K.3.5
ML20097C690
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 09/07/1984
From: Crouse R
TOLEDO EDISON CO.
To: Stolz J
Office of Nuclear Reactor Regulation
Shared Package
ML20097C697 List:
References
TASK-2.K.3.05, TASK-TM 1079, GL-83-10, TAC-49662, NUDOCS 8409170213
Download: ML20097C690 (1)


Text

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Docket No. 50-346 R)LEDO License No. NPF-3  !!EI!EI(IO$

Serial No. 107$ Acaam P. CRAISE Vce Pres

  • dent Nxkw September 7, 1984 wisi ess-sa2i Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz Operating Reactor Branch No. 4 Division of Operating Reactors United States Nuclear Regulatory Commission

-Washingtoa, D. C. 20555 i

Dear Mr. Stolz:

This is in response to TMI Action Item II.K.3.5 " Automatic Trip of

-Reactor Coolant Pumps" Generic Letter No. 83-10 (G.L. 83-10). Toledo Edison with other members of the B&W Owners Group bave participated

.and endorse the report " Analytical Justification for the Treatment of Reactor Coolant Pumps During Accident Conditions" (B&W Document No. 77-1149091-00). This generic report addresses the treatment of reactor coolant pumps during a_small break loss of coolant accident (SBLOCA) for 177 fuel assembly raised and lower loop units. The treatment for the steam generator tube rupture events in the above report is only applicable to lower loop plants.

l Attached is a copy of "Best Estimate Steam Generator Single Double-Ended Tube Rupture Analysis" (B&W Document No. 77-1152840-00) for the raised

. loop plant. This report together with the generic report provide Toledo Edison response for the treatment of reactor coolant pumps during transients and accidents. The analysis supports manually

-tripping of reactor coolant pumps on indication of " loss of subcooling margin". This will be incorporated into our Abnormal Transient Operating Guidelines Program (ATOG). The operator training on reactor coolant pump ATOG procedures will be completed by the end of the 1984 refueling outage.

Very truly yours,

(( 5 _ -

RPC: GAB j' mj c/25 cc: DB-1 Resident Inspector 8409170213 840907 PDR ADOCK 05000346 P PDR TOLEDO, OHIO 43652 l ge THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE ki