ML20079H082
| ML20079H082 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/30/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20079H076 | List: |
| References | |
| NUDOCS 9110100127 | |
| Download: ML20079H082 (3) | |
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i SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION t
SUPPORTING AMENDHENT NO. 137 TO FACILITY OPEP.ATING LICENSE NO. DPR-7?
I FLORIDA POWER CORPORATION, ET AL.
CRYSTAL RIVER UNIT NO. 3 NUCLEAR GENERATING PLANT DOCKET NO. 50-302 1.0 thTRODUCTION By letter dated June 20. -1991, FloridaPowerCorporation(FPC,thelicensee) requested an amendment to Facility Operating License No. DPR-72 for the Crystal RiverUnit3NuclearGeneratingStation(CR-3). The proposed amendmeri would extend the interval for Type B and C local leak rate testing (LLRT) on a one-time basis for containment penetrations and containment isolation valves (CIVs) until the eighth refueling outape, currently scheduled to begin April 30, 1992. The LLRTs for these containment penetrations and valves would begin to become overdue in March 1992.
By a separate let*er dated January 31,1991, as supplemented on May 16, 1991, the licensee also requested a one-time exemption from the 2chedular requirements of Sections III.D.2(a) and til.D.3 of Appendix J to 10 CFR Part 50 concerning LLRT testing intervals for 114 CIVs and 49 containment penetrations. The exemption would defer testing of the. valves and penetrations until the eighth refueling outage.
2.0 DISCUS $10N TechnicalSpecification(TS)4.6.1.2.dandSections!!I.D.2(a)and111.D.3 of 10 CFR Part 50, Appendix J require that Type B and C tests be performed at intervals no greater than 24 months. Historically, FPC lype B and C LLRT leakage has not been a source of significant "as-found' leakage as verified by the_ staff's review of FPC's 1989/1990 leak rate test results of containment penetrations and CIVs.
nd exemption to Appendix J are necessary to avoid an otherwise The TS changt.
unnecessary extension of the midcycle shutdown and to allow for leak rate teststobeperformedduring-theeighthrefuelingoutage(Refuel 8), scheduled to begin April 30,-1992. At that time, the containment penetrations and CIVs.
would exceed the 2-year testing interval requirement by approximately 2 months.
Therefore, FPC requests a footnote change to the TS and an exemption to allow for this extension for leak rate testing of containment penetrations and CIVs.
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2 3.0 EVALVATION TS 4.6.1.2(d) requires LLRTs (Type B and C) on primary CIVs and containrwnt penetrations to be perforud at intervals no greater than 24 conths.
The Commission's regulations (10 CFR part 50, Appendix J, Sections Ill.D.2(a) and Ill.D.3) require LLRTs (Type B and C tests) to be performed during each reactor shutdown for refueling, but in no case at intervals greater than 2 years. The licensee has requested that the 24-oonth testing interval for electrical penetrations and 114 CIVs and their associated containment penetrations identified in FPC letter dated May 16, 1991 be extended on a one-tine basis until the eighth refueling outage, prese.atly scheduled to begin April 30, 1992.
These valves would otherwise become overdue for testing between March 1992 and May 1902.
The staff rcviewed the 1989/1990 leak rate testing results of CIVs and their containment penetrations at CR 3 submitted with the licensee's letter of flay 16,1991.
The results of this review indicate that the "as found" and *as lef t" leak rate conditions of CIVs and containrent penetrations were significantly below the leak rate limit acceptance criteria.
The review of leak rate test results also indicated that FPC performed preventive maintenance to further reduce the leakage rate of CIVs and containment penetrations in the "as left" condition.
The 24-month interval requirement for Type B and C penetrations is intended to be often enough to prevent significant deterioration from occurring and long enough to permit LLRTs to be perforr.ed during plant outages.
The requested one-time extension would add approxinately ? rronths to the testing interval for penetrations and C1Vs.
The condition of the components is not expected to change significantly during this short extension pericd. Testing prior to the refueling outage would require an additional outage for this purpose only, or significant extension of the mid-cycle maintenance outage.
4.0
SUMMARY
Based on the short one-time extension requested, the previous satisfactory leak rate test results, and the small likelihood of significant degradation during the extension period, the NRC staff concludes that extending the surveillance testing interval for Type.B and C tests until Refuel 8, as requested, provides reasonable assurance tha'.he proposed changes will present no undue risk to public health and safety, and is, therefore, acceptable.
5.0 STA1E CONSULTATION Based upon the written notice of the proposed amendment, the Florida State official had no coments.
6.0 ENVIRONt1 ENTAL CONSIDERATION This amendment changes surveillance requirements.
The NRC staff has determined that the emendment involves no significant increase in the amounts, and no aignificant change in the types, of any effluents that may be released offsite, ano 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
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been no public corrient on such finding (56 FR 33956). Accordingly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10CFR51.?2(c)(9). pursuant to 10 CFR 51.2?(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of this amendment.
7.0 CONCLUSION
The Commission has concluded, based on the considerations discussed above, that:
not be endangered by operation in the proposed manner, (2) y of the public will (1) there is reasohable assurance that the health and safetsuch activities will be conducted in compliance with the conmission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public, principal Contributors:
F. TalFot H. Silver Date: September 30, 1991 l
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