ML20056C467
| ML20056C467 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 06/21/1993 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20056C466 | List: |
| References | |
| NUDOCS 9306240194 | |
| Download: ML20056C467 (2) | |
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%fj NUCLEAR REGULATORY COMMISSION W ASHINoToN. D.C. 20555 0001 k.....f' SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 80 TO FACILITY OPERATING LICENSE NO. NPF-30 UNION ELECTRIC COMPANY CALLAWAY PLANT. UNIT 1 DOCKET N0. 50-483
1.0 INTRODUCTION
By application for license amendment dated March 9,1993, Union Electric Company (the licensee) requested changes to the Technical Specification (TS)
Section 3/4.8.1, "A.C. Sources," for the Callaway Plant, Unit 1.
The amendment would delete the surveillance requirement of Technical Specification 4.8.1.1.2.h(2), which involves performing a pressure test of portions of the diesel fuel oil system. Alternative testing for the tanks and piping would include leak testing at hydrostatic head pressure with the tanks filled to design capacity and would be governed by Technical Specification 4.0.5.
2.0 EVALUATION The existing Technical Specification 4.8.1.1.2.h(2) requires a pressure test of those portions of the diesel fuel oil system designed to Section III, subsection ND of the ASME Boiler and Pressure Vessel Code. This pressure test is required to be performed at 110 percent of the system design pressure.
This test is consistent with the acceptable method which is presented in NRC Regulatory Guide 1.137, " Fuel-0il Systems for Standby Diesel Generators."
Regulatory Guide 1.137 adopts Section 7.3 of ANSI N195-1976, "Fue' 011 Systems for Standby Diesel-Generators" which specifies testing in accordance with Section XI, " Rules for Inservice Inspection of Nuclear Power Plant Components," of the ASME Code.
Section XI Article IWD-5000 in turn requires testing of components at 1.10 times the system pressure for systems with design temperatures less than 200*F or in the case of atmospheric storage tanks, the hydrostatic head, developed with the tank filled to its design capacity, is considered to be an acceptable test pressure.
The licensee has requested the proposed change due to the diesel fuel oil system's incompatibility with the requirements of the performance of a pressure test at 110 percent of system pressure. The diesel fuel oil tank is vented to atmosphere without an existing ability to isolate and pressurize the tank in order to perform the pressure test. The fulfillment of ASME Code requirements is achieved by the performance of the alternate testing consisting of leak testing with the associated atmospheric tanks filled to design capacity.
The alternate test is considered to provide equivalent assurance of the tank and pipir.g integrity in that filling the tank to design capacity and verifying that no loss of inventory occurs is comparable to 9306240194 930621 PDR ADDCK 05000493 P
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.. pressurizing the system and monitoring for any decrease in pressure.
The diesel fuel oil system is classified as ASME Code Class 3 in accordance with the guidance of Regulatory Guide 1.26, " Quality Group Classifications and Standards for Water, Steam, and Radioactive-Waste-Containing Components of Nuclear Power Plants." Technical Specification 4.0.5 requires testing of ASME Code Class 1, 2, and 3 components in accordance with Section XI of the ASME Code.
The existing Technical Specification 4.8.1.1.2.h(2) is therefore seen as redundant to the requirements of Technical Specification 4.0.5 in that ASME Section XI testing is required, but the specific testing methodology of 1
Technical Specification 4.8.1.1.2.h(2) is not practical for the current design of the diesel fuel oil system.
Upon review of the licensee's submittal, the staff concludes that the alternative testing allowed by Section XI of the ASME Code is an adequate inservice testing methodology and that the performance of the inservice testing is required by Technical Specification 4.0.5.
Therefore, the deletion of Technical Specification 4.8.1.1.2.h(2) is deemed acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Missouri State official was notified of the proposed issuance of the amendment.
The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
The amendment changes a requirement with respect to the installation or use of a facility component located within the restricted area as defined in.10 CFR Part 20 and changes surveillance requirements.
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 clic comment on such finding (58 FR 19490). Accordingly, this amendmen, 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.
5.0 CONCLUSION
The staff has concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safetylof the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
L. R. Wharton Date: June 21, 1993 u
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