ML20039A407
| ML20039A407 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 12/03/1981 |
| From: | Kiper K Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8112170509 | |
| Download: ML20039A407 (6) | |
Text
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Docket Nos.: STtt 50 454,.STri 50-455 and STH 50-456, STN 50-457-APPLICANT:. Conronwealth Edison Company FACILITY:
Byron and Braidwood Stations SUPJECT:
SUMMARY
OF ARIS RELIABILITY REVIEW !!EETING A reeting was -held November 17, 1981 in Bethesda, Maryland with representatives from Comonwealth Edison Company and their contractor, Torrey Pines Technology, to discuss the Byron /Braidwood auxiliary feedwater systen reliability analysis. The list of attendees is-included as Enclosure 1.
Representatives from Brookhaven National Laboratory, consultants to HRC, presented the results of their analysis of the AFWS reliability, using the applicant's data and fault trees. They found discrepancies in comparison with the applicant's analysis, with the failure probabilities for two transient cases:
- 1. ' loss of main feedwater (LOMF) and 2.
loss of nain feedwater/ loss of offsite power (L0t!F/ LOOP)
The discrepancy in the first case, L0iiF, resulted from the applicant including the availability of the start-up train C which the staff did not include. The staff asked for core details of the dependence of train C on the cain feedwater train before accepting the assumption of its availability on LO!'F.
The main concern of the staff was with the discrepancy in the LO"F/ LOOP
. The applicant failed to include the diesel generator failure case.
probability in calculating its revised figures for AFWS availability for this case. The staff required that a reasonable ~disel failure rate should be included. Also, the staff expressed an interest in additional infornation which the applicant agreed to supply, to support their clain that their present AFWS is sufficiently reliable in the event of loss of offsite power because of high grid reliability.
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J. Miller F. Rosa G. Lainas W. Butler R. Vollmer W. Kreger J. P. Knight R. Houston R. Bosnak F. Schauer L. Rubenstein R. E. Jackson KKiper T. Speis Project Manager M. Srinivasan Attorney, OELD J. Stolz M. Rushbrook S. Hanauer OIE (3)
W. Gammill ACRS (16)
T. Murley F. Schroeder D. Skovholt M. Etnst NRC
Participants:
R. Baer C. Berlinger SChesnut, JPapazoglou (BNL)
K. Kniel LRubenstein, KKiper G. Knighton OParr A. Thadani VPanciera D. Tondi JWenniel J, Kramer AThandani D, Vassallo JTsao P. Collins RYoungblood (BNL)
D. Ziemann bcc: Applicant & Service List
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o The staf f reiterated its position, as previously detailed in a letter to the apolicant dated October 30, 1981, reoarding implenentation of a third AFU pump that would be functional durina LOOP.
Kenneth L. Kiper, Project !!anager Licensing Branch !!o. I Division of Licensing
Enclosure:
As stated cc:
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e ENCLOSURE 1 Byron AFWS Reliability Meeting November 17, 1981 I
Attendees NRC L. Rubenstein O. Parr V. Panciera l
J. Wermiel A. Thadani J. Tsso R. Youngblood (BNL) l i
J. Papazoglou (BNL)
K. Kiper Commonwealth Edison Company L. Bowen T. Weis Torrey Pines, GAC T. Taniguchi l
Public Service of Indiana l
S. Brewer l
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Mr. Louis'O.~ De1 George Director.o.f Nuclear Licensing Commonwealth Edison Company Post Office Box 767:
Chicago, Illinois 60690
'cc: Mr. William Kortier Atomic Power Distribution-Westinghouse Electric Corporation Post Office Box 355 Pittsburgh, Pennsylvania 15230 Paul M. Murphy, Esq.
Isham, Lincoln & Beale One First National Plaza 42nd Floor Chicago, Illinois 60603 C. Allen Bock, Esq.
~
Post Office Box 342 Urbana, Illinois 61801 Thomas J. Gordon, Esq.
Waaler, Evans & Gordon 2503'S.-Neil Champaign, Illinois 61820 w
Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street Essex, Illinois 60935 Mr. Edward R. Crass Nuclear Safeguards and Licensing Division Sargent & Lundy Engir.eers 55 East Monroe Street Chicago, Illinois 60603 Nuclear Reoulatory Commission, Region III Office of Inspection and Enforcement 799 Roosevelt Road
. Glen Ellyn, Illinois 60137
O 4
Mr. Louis 0. DelGeorge Director of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690 ccs:
l Mr. William Kortier U. S. Nuclear Regulatory Commission Atomic Power Distribution Resident Inspectors Office l
Westinghouse Electric Corporation 4448 German Church Road
.P. O. Box 355 Byron, Illinois 61010 Pittsburgh, Pennsylvania 15230 l
Ms. Diane Chavez Paul M. Murphy, Esq.
602 Oak Street, Apt. #4 Isham, Lincoln & Beale Rockford, Illinois 61108 l
One First National Plaza l
42nd Floor i
Chicago, Illinois' 60603 c
I Mrs. Phillip B. Johnson 1907 Stratford Lane Rockford, Illinois 61107 l
l Ms. Bridget Little Rorem Appleseed Coordinator 117 North L'inden Street Essex, Illinois 60935 Dr. Bruce von Zellin Department of Biological Sciences l
Northern Illinois University l
Do;aia, Illinois 61107 I
Mr. Edward R. Crass Nuclear Safeguards and Licensing Division Sr
-s ' & Lundy Encineers 55 East Monroe Street Chicago, Illinois 60603 Nuclear Regulatory Commission l
Region III l
Office of Inspection and Enforcement 799 Roosevelt Road Glen Ellyn, Illinois 60137 i
Myron Cherry, Esq.
Cherry, Flynn and Kanter l
1 IBM Plaza, Suite 4501 Chicago, Illinois 60611 e
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