ML20210S073
| ML20210S073 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 04/24/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20210S057 | List: |
| References | |
| TAC-65069, NUDOCS 8605200426 | |
| Download: ML20210S073 (3) | |
Text
o UNITED STATES g
E NUCLEAR REGULATORY COMMISSION o
p WASHINGTON, D, C. 20555
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 94T0 FACILITY OPERATING LICENSE N0. NPF-3 TOLED0 EDIS0N COMPANY AND THE CLEVELAND ELECTRIC ILLUMINATING COMPANY DAVIS-BESSE NUCLEAR POWER STATION, UNIT NO. 1 DOCKET NO. 50-346 INTRODUCTION By letter dated September 1, 1983, as revised January 30, 1985, Toledo Edison Company (TED or the licensee) requested amendment to the Technical Specifications (TSs) appended to Facility Operating License No. NPF-3 for the Davis-Besse Nuclear Power Station, Unit No. 1.
The proposed amendment would change those sections of the Davis-Besse Unit 1 TSs that specify the inservice surveillance requirements for hydraulic snubbers and would add requirements for mechanical snubber operability and testing. The proposed amendment would also delete the listing of safety-related snubbers in accordance with guidance provided in NRC Generic Letter 84-13.
EVALUATION The licensee's proposed snubber surveillance and operability requirements are, in general, in accordance with the requirements specified in the Standard Technical Specifications (STSs). However, the NRC staff recommended two additional changes to the licensee's proposed requirements during its review.
The proposed TSs should include a transient event inspection requirement as follows:
Transient Event Inspection An inspection shall be performed of all snubbers attached to sections of systems that have experienced unexpected, potentially damaging transients as determined from a review of operational data and a visual inspection of the systems, within six months following such an event.
In addition to satisfying the visual inspection acceptance criteria, freedom-of-motion of mechanical snubbers shall be verified using at least one of the following:
(1) manually induced snubber movement; or j
(2) evaluation of in-place snubber piston setting; or (3) stroking the mechanical snubber through its full range of travel.
8605200426 860424 PDR ADOCK 05000346 P
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. Inspections conducted as described above have proven to be especially effective for identifying damaged snubbers. Therefore, this recommendation should be included in the TSs.
The proposed TSs do not identify an acceptance criterion regarding functional testing for snubber activation similar to paragraphs 4.7.9.d.1 and 4.7.9.e.1 of the STSs.
By letters dated January 22, 1986, and March 26, 1986, the licensee agreed to submit a separate amendment application which would propose to add the transient event inspection requirement and the acceptance criterion for functional testing. The licensee requested that NRC action continue on the TS changes requested by the application of September 1, 1983, as revised January 30, 1985. We find the licensee's commitment to be acceptable and conclude that the proposed changes will upgrade the requirements for hydraulic snubbers and add requirements for mechanical snubbers.
The licensee's proposal to remove the listing of safety-related snubbers from the TSs is in accordance with the guidance provided in Generic Letter 84-13 dated May 3,1984, " Technical Specifications for Snubbers." This generic letter concludes that the tabular listing of snubbers currently included in the TSs may be deleted by any licensee submitting a license amendment.
It states that the NRC staff has reassessed the inclusion of snubber listings in the TSs and concluded that such listings are not necessary provided the snubber TS is modified to specify which categories of snubbers are required to be operable. Recordkeeping requirements remain unchanged.
Since any changes in snubber quantities, types, or locations would be a change to the facility, such changes would be subject to the provisions of 10 CFR Part 50.59 and would have to be reflected in the required records. The proposed change is administrative in nature and in itself does not affect plant design or operation, involve modifications to plant equipment, or make changes which would affect plant safety analyses. Any changes in snubber quantities, types, or locations would be a change to the facility and therefore would be subject to the provisions of 10 CFR 50.59. The revised TS specifies which snubbers are required to be operable.
Recordkeeping requirements have been upgraded to bring them into conformance with Generic Letter 84-13. Therefore, we conclude that the proposed TS change is acceptable.
ENVIRONMENTAL CONSIDERATION This amendment involves changes in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes in surveillance requirements. We have determined that the amendment involves no significant increase in the amounts, and no significant s
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.
J 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 this amendment will not be inimical to the common defense and security or to the health and safety of the public.
i Dated: April 24,1986 Principal Contributor: Horace Shaw t
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