ML20236G876
| ML20236G876 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 10/28/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20236G874 | List: |
| References | |
| NUDOCS 8711030326 | |
| Download: ML20236G876 (4) | |
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UNITED STATES
! ', # r [,j NUCLE AR REGULATORY COMMISSION p, g 4 '. E WASHINGTON, D. C. 20555 Y..... d' SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 109 TO PROVISIONAL OPERATING LICENSE NO. DPR-20 CONSUMERS POWER COMPANY PALISADES PLANT DOCKET NO. 50-255
1.0 INTRODUCTION
Consumers Power Company (CPCo or the licensee) submitted a Technical Specification Change Request on May 4, 1987, addressing changes to the surveillance of the containment prestressing system.
The proposed changes were required by a CPCo commitment, documented in NUREG-0820, October 1982, to develop acceptance criteria consistent with the proposed ASME Code or equivalent.
The licensee committed to meet the pertinent criteria of ASME Code,Section XI, Subsection IWL, and NRC Regulatory Guide 1.35, Revision 3.
The licensee has also submitted a revised Technical Specification Change Request on September 16, 1987.
The revised document addresses staff questions raised on CPC0's May 4, 1987, submittal.
2.0 EVALUATION The NRC staff has reviewed the following CPCo documents:
8 1.
Request for Change to the Technical Specifications, License DPR-20, (May 4 and September 16, 1987, versions).
2.
Proposed Technical Specification Page Changes (May 4 and September 16, 1987, versions).
3.
Palisades Plant, 10 year Tendon Surveillance Report, dated November 17, 1981.
4.
Palisades Plant, 5 year Tendon Surveillance Report, dated March 26, 1976.
5.
Palisades Plant, 3 year Tendon Surveillance Report, dated April 29, 1974.
6.
Palisades Plant, 1 year Tendon Surveillance Report, dated March 2, 1972.
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l l l The proposed changes to the Technical Specifications for tendon surveillance requirements delete certain requirements which have been accomplished by the 1
1, 2, 5, and 10 year tendon surveillance, establish a new 5 year surveillance l
Schedule, and acceptance requirements identified in the proposed Subsection l
IWL,Section XI of the ASME Code and Revision 3 to NRC Regulatory Guide 1.35.
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The minimum number of tendons to be included in each 5 year surveillance will be four dome tendons (including one from each group), four vertical tendons, and five hoop tendons. One tendon from each group of tendons will be subjected to complete detensioning to identify broken er damaged wires.
- Also, elongation and related jacking force measurements will be made at three equally spaced levels of force from zero to the final seating force, during the retensioning of the detensioned tendons.
Section 4.5.d of the specification addresses the required laboratory tests for the removed tendon wires and filler grease.
Specific wires are identified for the tensile tests to determine their yield and ultimate strengths and elongation. The filler grease from the examined tendons will be analyzed to determine if the alkalinity, water content, and concentration of water soluble chlorides, nitrates and sulfides meet the allowable limits identified in the Technical Specifications. Also, proper procedures will be implemented to avoid grease voids during the reinstallation of the examined tendons.
The reporting requirements of Regulatory Guide 1.35, Revision 3, will be followed when the acceptance criteria are exceeded. Generally, the reporting requirement provisions of 10 CFR 50.73 will be followed.
However, the presence of grease voids and free water will be evaluated and reported in the-post-inspection special report required by Section 6.9.3.3.
This report will be submitted 90 days after completion of the inspection.
The NRC staff raised four questions regarding the licensee's submittal of May 4, 1987.
The first question addressed concern of the fact that all of the requirements of NRC Regulatory Guide 1.35, Revision 3, and those of ASME,Section XI, Subsection IWL (upcoming revision) may not be exactly identical, 1
Special concern was identified regarding the reporting requirements of Section C.7.1.3 and the grease voids requirements of Section C.7.4 of Regulatory Guide 1.35, Revision 3.
The second question focused on the requirements of Regulatory Guide 1.35, Revision 3, Section C.2.2, which addresses the minimum population of tendons to be evaluated for each type of tendon within the structure. The third question addressed the NRC staff concern that the changes may have reduced the level of surveillance identified in the original Technical Specifications.
The fourth question raised concern that a third year surveillance observation may have not been followed-up during the i
surveillance program. Specifically, the third year surveillance highlights reported the presence of water in the end cap of a dome tendon (02-53).
The following surveillance report did not address any follow-up action on the l
third year surveillance observation.
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-3 The licensee has addressed the NRC staff questions on Reference 1 in their Reference 2.
The staff has found the changes identified in Reference 2 i
acceptable in their entirety.
The licensee is complying with the requirements of Regulatory Guide 1.35, Revision 3, Sections C.7.1.3, C 7.4, and C.2.2.
j Thus, the licensee has addressed and resolved the first three staff J
questions. Also, the licensee has indicated that additional evaluations of
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the dome tendon D2-53 were not required because the laboratory evaluation of the water and grease indicated acceptable levels for chlorides, nitrates and sulfides, and no evidence of corrosion was observed in the field inspections.
CPCo has revised their Technical Specifications on surveillance of the prestressing system for the Palisades Plant to meet the latest industry and regulatory requirements contained in the ASME,Section XI, Subsection IWL.
CPCo has also addressed all NRC staff concerns regarding the provisions of NRC Regulatory Guide 1.35, Revision 3, on the minimum number of tendons designated for surveillance, grease voids reporting requirements, evaluation of water and grease, and other minor clarifications.
The revised Technical Specifications, along with the additional commitments, meet and/or exceed any technical requirement in the previous Technical Specifications for tendon system surveillance except for detensioning only one tendon of each group. Therefore, the NRC staff finds the proposed changes to the Technical Specifications on surveillance of the prestressing system for the Palisades Plant submitted on September 16, 1987, acceptable.
3.0 ENVIRONMENTAL CONSIDERATION
This amendment involves a change to a surveillance requirement. The staff has determined that the amendment involves no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public comment on such finding.
Accordingly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the' issuance of this amendment.
4.0 CONCLUSION
We have concluded, based on the considerations discussed above, that (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (2) such activities will be conducted in compliance with the Commission's regulations, and the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
5.0 REFERENCES
1.
Letter dated May 4, 1987, from Kenneth W. Berry to NRC, with attachments.
2.
Letter dated September 16, 1987, from Kenneth W. Berry to NRC, with attachments.
Dated: October 28, 1987 Principal Contributor:
Frank Rinaldi, NRR/ESGB a
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