ML18066A254
| ML18066A254 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 07/27/1998 |
| From: | Robert Schaaf NRC (Affiliation Not Assigned) |
| To: | Haskell N CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TAC-MA0663, TAC-MA663, NUDOCS 9807300412 | |
| Download: ML18066A254 (3) | |
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Mr. Nathan L. Haskell Director, Licensing Palisades Plant
- 27780 Blue Star Memorial Highway Covert, MI 49043 July 27, 1998
SUBJECT:
PALISADES PLANT-REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE 25-YEAR CONTAINMENT INTEGRITY SURVEILLANCE REPORT (TAC NO. MA0663)
Dear Mr. Haskell:
By letters dated December 18, 1997, and February 23, 1998, Consumers Energy Company submitted the 25-year_ containment integrity surveillance report for the Palisades Plant. The staff has reviewed the report and has determined that additional information is necessary to complete our review. Please provide a response to the enclosed request for additional information within 60 days from the date of this letter. Should you have any questions regarding this request, please contact me at (301) 415-1312.
Docket No. 50-255 Sincerely, ORIGINAL SIGNED BY Robert G. Schaaf, Project Manager Project Directorate 111-1 Division of Reactor Projects - 111/IV Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information cc w/ericl: See next page DISTRIBUTION:
- Docket File (50-255.) B. Burgess, Rill PUBLIC E. Adensam (EGA1)
OGG PDlll-1 Rdg ACRS H. Ashar DOCUMENT NAME: G:\\WPDOCS\\PALISAD~\\PALA0663.RAI To receive a copy of this document, Indicate In the box: ""C"" = Copy without attachmenUenclosure ""E" = Copy with attachmenUenclosure "N"" = No copy OFFICE PM:PD31 LA:PD31 E D:PD31 NAME DATE FFICIAL RECORD COPY
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")J rl Mr. Nathan L. Haskell Consumers Energy Company cc:
Mr. Thomas J. Palmisano Site Vice President Palisades Plant 27780 Blue Star Memorial Highway Covert, Michigan 49043 Mr. Robert A. Fenech, Sr Vice Pres Nuclear, Fossil, and Hydro Operations Consumers Energy Company 212 West Michigan Avenue Jackson, Michigan 49201 M. I. Miller, Esquire Sidley & Austin 54th Floor One First National Plaza Chicago, Illinois 60603 Mr. Thomas A. McNish Vice President & Secretary _
Consumers Energy Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Energy Company 212 West Michigan Avenue Jackson, Michigan 49201 Regional Administrator, Region Ill 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 Palisades Plant Office of the Governor P. 0. Box 30013 Lansing, Michigan 48909 U.S. Nuclear Regulatory Commission Resident Inspector's Office Palisades Plant
-27782 Blue Star Memorial Highway Covert, Michigan 49043 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 June 1998
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REQUEST FOR ADDITIONAL INFORMATION RELATED TO CONSUMERS ENERGY COMPANY'S 25-YEAR CONTAINMENT INTEGRITY SURVEILLANCE REPORT PALISADES NUCLEAR PLANT DOCKET NUMBER 50-255
- 1.
Table VIII, Attachment I (February 23, 1998, submittal): The predicted forces shown for sampled vertical, hoop, and dome-tendons indicate that the elastic shortening losses in all the tendons for each group (vertical, hoop, and dome) are the same. This is possible only if all the tendons in that group were tensioned at the same time. For the comparison of individual tendon lift-off forces with the respective predicted forces, this distinction is important. Provide justification for using the same value of.predicted forces. Also, provide information about how the time-dependent prestressing force losses (due to creep and shrinkage of concrete, ~nd relaxation of prestressing steel) are incorporated in the predicted forces.
- 2.
Table VIII, Attachment I: The stresses in the wires of Tendon V-126 are above 70 percent of the guaranteed ultimate tensile strength of the wires at the 25-year surveillance. Factors such as improper lift-off technique, improper jack calibration, or high initial installation force could be responsible for such measured data. Provide an explanation for such high stresses in the tendon wires, including any history of prior measurements and initial installation data. It appears that the negative regression.
analysis line for the vertical tendons (Figure 5 of the February 23, 1998, submittal) is due to the high lift-off force of this tendon. Please verify the reliability of the lift-off reading, and explain the anomalous bE!havior of the vertical tendons.
ENCLOSURE