ML18066A784
| ML18066A784 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 12/20/1996 |
| From: | Hannon J NRC (Affiliation Not Assigned) |
| To: | Bordine T CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML18066A785 | List: |
| References | |
| TAC-M95134, NUDOCS 9612240271 | |
| Download: ML18066A784 (4) | |
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.UNITED STATES NUCLEAR RECU~:LATORY COMMISSION WASHINGTOll!,,O.C. 20555--0001 Mr. Thomas C. Bordine Manager, Licensing Palisades Plant 27780 Blue Star Memorial Highway Covert, MI 49043 December 20, 1996
SUBJECT:
PALISADES: EVALUATION OF UPDATED REACTOR PRESSURE VESSEL FLUENCE VALUES (TAC NO. M95134)
Dear Mr. Bordine:
By letter dated April 4, 1996, you submitted an updated neutron fluence evaluation for the Palisades reactor pressure vessel and requested that it be reviewed and accepted as the basis for the 10 CFR 50.61 pressurized thermal shock (PTS) vessel embrittlement evaluation.
You provided additional information in response to staff questions on June 12, June 21, August 27, September 9, September 19, and October 1, 1996.
The submittal claimed a 25 percent reduction in reactor vessel fluence from the value accepted in the previous review of the Palisades reactor vessel.
The staff received contract assistance in this review from the Brookhaven National Laboratory (BNL).
The National Institute of Standards and Technology (NIST) also provided contract assistance for specific dosimetry questions.
Our evaluation indicates that an 8 percent reduction in the calculated fluence due to the physical changes in the plant is acceptable. The remaining 17 percent reduction, consisting of a bias resulting from comparison of calculated to measured fluence values and a reduction due to spectral adjustments, can not be approved at this time.
The current Palisades fluence value results in the Palisades reactor vessel reaching the PTS screening criteria in 1999.
The eight percent reduction approved by this evaluation results in the vessel reaching*the screening criteria in 2003.
This is an interim report. Our review effort will continue at BNL, focusing on the acceptability of the calculation-to-measurement bias and the statistical treatment of the data. Our safety evaluation is provided as NRG FILE CENTER COPY 240055
(-- -9612240271 961220
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Mr. Thomas December 20, 1996.
The BNL technical evaluation report is provided as Enclosure 2.
If you have any questions regarding the enclosed evaluations, please contact Robert Schaaf of my staff at (301) 415-1312.
Docket No. 50-255
Enclosures:
- 1. Safety Evaluation Sincerely, Orig. signed by John N. Hannon, Director Project Directorate III-1 Division of Reactor Projects - III/IV Office.of Nucl~ar Reactor Regulation
- 2.
Technical Evaluation Report cc w/encls:
see next page DISTRIBUTION Docket File B. Sheron R.C. Jones, Jr.
R. Schaff PUBLIC G. Lainas K. Wichman L. Lois POI II-1 Reading G. Holohan B. Ell tot OGC-WF F. Miraglia E. Adens am (EGAl)
S. Sheng ACRS R. Zimmerman J. Hannon E. Hackett L. Miller, RIII A. Thadani J. Strosnider C. Jamerson SEDB DOCUMENT NAME G:\\WPDOCS\\PALISADE\\PAL95134.KAC attachment/enclosure.
DATE
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Mr. Thomas Enclosure 1.
The BNL technical evaluation report is provided as Enclosure 2.
If you have any questions regarding the enclosed evaluations, please contact Robert Schaaf of my staff at (301) 415-1312.
Docket No. 50-255
Enclosures:
- 1.
Safety Evaluation Sincerely, John N. Hannon, Director Project Directorate 111-1 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation
- 2.
Technical Evaluation Report cc w/encls:
see next page
Mr. Thomas C. Bordine Consumers Power Company cc:
Mr. Thomas J. Palmisano Plant General Manager Palisades Plant 27780 Blue Star Memorial Highway Covert, Michigan 49043 Mr. Robert A. Fenech Vice President, Nuclear Operations Palisades Plant 27780 Blue Star Memorial Highway Covert, Michigan 49043 M. I. Miller, Esquire Sidley & Austin 54th Floor One First National Plaza Chicago, Illinois 60603 Mr. Thomas A. McNish Vice President & Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Jerry Sarno Township Supervisor Covert Township 36197 M-140 Highway Covert, Michigan 49043 Office of the Governor Room 1 - Capitol Building Lansing, Michigan 48913 U.S. Nuclear Regulatory Commission Resident Inspector's Office Palisades Plant 27782 Blue Star Memorial Highway Covert, Michigan 49043 Palisades Plant Drinking Water and Radiological Protection Division Michigan Department of Environmental Quality 3423 N. Martin Luther King Jr Blvd P. 0. Box 30630 CPH Mailroom Lansing, Michigan 48909-8130 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N. W.
Washington DC 20037 Michigan Department of Attorney General Special Litigation Division 630 Law Building P.O. Box 30212 Lansing, Michigan 48909 August 1996