ML20217D983
| ML20217D983 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 09/26/1997 |
| From: | Wharton L NRC (Affiliation Not Assigned) |
| To: | Gambhir S OMAHA PUBLIC POWER DISTRICT |
| References | |
| GL-88-20, TAC-M98936, NUDOCS 9710060242 | |
| Download: ML20217D983 (4) | |
Text
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UNITE] STATES u
8 NUCLEAR RE2VLATCRY CEMMISSION f
WASHINGTON. D.C. *aaas maa1 September 26, 1997 Mr. S. K. Gambhir Division Manager - Engineering & Operations Support Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.
Post Office Box 399 Hwy. 75 - North of Fort Calhoun Fort Calhoun. Nebraska 68023-0399
SUBJECT:
FORT CAIHOUN STATION, UNIT NO. 1 - RESPONSE TO REQUEST TO REEVALUATE HUMAN RtLIABILITY ANALYSIS (HRA) PORTION OF INDIVIDUAL PLANT EXAMINATION (IPE) (TAC NO. M98936)
Dear Mr. Gambhir:
By letter dated May 8. 1997. Omaha Public Power District (0 PPD) requested that the NRC reevaluate the HRA portion of the Fort Calhoun Station (FCS) IPE.
In this letter. OPPD stated that "This additional information is intended to resolve the NRC's reservation regarding the HRA portion of the FCS IPE and allow OPPD to use the PRA in support of risk-based regulatory applications beyond those associated with Generic Letter 88-20." OPPD's )osition is that the FCS IPE accurately reflects risk-significant aspects of luman performance and that additional treatments in the HRA area are unwarranted.
The NRC Staff Evaluation Report. dated December 9,1996, identified a weakness in the HRA portion of the FCS IPE. The staff reviews of the nuclear industry's IPEs assessed whether licensees
- methods were capable of identifying the most likely severe accidents and vulnerabilities. As stated in the staff evaluation, the FCS IPE met the intent of Generic Letter 88-20.
and, as such, fulfilled its intended purpose. Any additional a) plication of the underlying PRA to other regulatory applications such as tecinical specification changes to increase the allowed outage times, would require followup by the cognizant technical staff to determine the applicability of the underlying PRA models, assumptions, and results.
This would apply to any licensee, even those whose IPE was deemed by the staff to be without any weaknesses.
Therefore, the staff has concluded that no further review of the HRA portion of the FCS IPE will be performed.
Furthermore if the staff were to reevalute and modify its conclusion with regards to the identified HRA weakness, it might be construed as approval allowing the PRA to be exempt from further staff scrutiny.
In contrast, the staff position is that it is more appropriate that the new HRA information i
provided by a licensee be considered by the staff in their evaluations of
()[Di future risk-informed applications proposed by the FCS.
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NRC RW cm un u p 9710060242 970926
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Mr. S. K;;Gambhir
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September 26, 1997 For these reasons, the' staff has concluded that it would not be productive to review the HRA portion of the FCS IPE submittal again,-
-If you have any questions. please contact Mark Cunningham (301) 415-6189.
Sincerely.
--ORIGINAL SIGNED BY L. Raynard Wharton Project Manager Project Directorate IV-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket No. 50-285 cc:
See next page DISTRIBUTION:
Docket File-RWharton PUBLIC EPeyton PDIV-2 Reading.
0GC EGA1 WJohnson. Region IV WBateman PGwynn. Region IV ACRS JLane RHernan MCunningham DOCUMENT NAME:
FCS98936.IPE OFC ADIV-2/PM PDIV-2/LA NAME YWharton LP"eftEd DATE 9/&/97 9 @ /97 OFFICIAL REC 0fD COPY
Mr. S. K. Gambhir,
For these reasor,s, the staff has concluded that it would not be productive to review the HRA portion of the FCS IPE submittal again.
If you have any questions, please contact Mark Cunningham (301) 415-6189.
Sincerely.
10^
L. Raynard Wharton, Project Manager Project Directorate IV-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-285 cc:
See next page i
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_Mr. S. K. Gambhir.
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cc:
Winston-& Strawn ATTN: -- Perry D. Robinson, Esq.
1400 L Street, N.W.
- Washington, DC 20005 3502 s
Mr.-Jack Je'nsen. Chairman Washington County Board of Supervisors Blair, Nebraska 68008-
-Mr. Wayne Walker,-Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 309 Fort Calhoun, Nebraska 68023 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Ms. Cheryl Rodgers, LLRW Program Manager Environmental Protection Section Nebraska Department of Health 301 Centennial Mall, South P.O. Box 95007':
Lincoln, Nebraska 68509-5007
<Mr. James W.. Chase, Manager-Fort Calhoun Station Post Office Box 399 Fort Calhoun, Nebraska 68023 Mr. James W. Tills Manager - Nuclear Licensing Omaha Public Power District Fort Calhoun Station FC-2-4 Adm.
' Post Office Box 399 Hwy. 75 - North of Fort Calhoun Fort Calhoun,-Nebraska 68023-0399
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