ML20248D902
| ML20248D902 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/28/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20248D893 | List: |
| References | |
| NUDOCS 9806030126 | |
| Download: ML20248D902 (3) | |
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NUCLEAR REGULATORY COMMISSION WASHINGTON D.C. 30006 4 001 i
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS. 718iAND 02 TO FACILITY OPERATING LICENSE NOS. DPR-88 AND NPF-73 DUQUESNE LIGHT COMPANY OHIO EDISON COMPANY PENNSYLVANIA POWER COMPANY T'HE CLEVELAND ELFCTRIC ILLUMINATING COMPAtf(
THE TOLEDO EDISON COMPANY BEAVER val i FY POWER STATION. UNIT NOS.1 AND 2 DOCKET NOS. 50-334 AND 50-412
1.0 INTRODUCTION
By letter dated March 16,1998, as supplemented May 14,1998, the Duquesne Light Company (the licensee) submitted a request for changes to the Beaver Valley Power Station, Unit Nos.1 and 2 (BVPS-1 and BVPS-2), Technical Specifications (TSs). The requested changes would revise TS Table 4.3-1 to add footnote 6 to the channel calibration requirement for all instrument l
channels that are provided with an input from neutron flux detectors. Footnote 6 provides that neutron detectors may be excluded from channel calibrations. In addition, BVPS-1 TS Table 4.3-1 would be revised to add channel calibration requirements to items 2.b. (Power Range, Neutron Flux, Low Setpoint),5. (Intermediate Range, Neutron Flux),6. (Source Range, Neutron Flux l
(Below P-10)), and 23. (Reactor Trip System interlocks P-6, P-8, P-9, and P-10). Furthermore, l
changes would be made to correct page numbers in the BVPS-2 TS Index and to add corresponding changes to the TS Bases for both units. The May 14,1998, letter provided minor l
l editorial changes to the TS pages that did not change the initial proposed no significant hazards consideration dets,mination or expand the amendment request beyond the scope of the April 22, 1998 Federal Register notice.
2.0 EVALUATION TS Table 4.3-1 specifies the periodic surveillance test requirements for the reactor trip system instrumentation, including the channel calibration requirements for instrument channels provided with inputs from neutron flux detectors. The TS definition of channel calibration includes provisions that the channel output shall respond with the necessary range and accuracy to known values of the parameter which the channel monitors and that a channel calibration shall encompass the entire channelincluding the sensor and alarm and/o. trip functions. Thus, to perform a channel calibration of a neutron flux channel, as required by this definition, would require including the neutron flux detector in the calibration. Inclusion of neutron flux detectors in r
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.t 2-the channel calibration process is impractical in power reactor applications since to do so would require subjecting the detectors to known neutron fluxes. Therefore, the NRC staff has historically excluded neutron detectors from channel calibration requirements. This exclusion is currently applicable to TS Table 4.3-1, item 2.a. (Power Range, Neutron Flux, High Setpoint),
The proposed TS change would not change this provision but would add the exclusion to all other channels which receive ir. puts from neutron flux detectors. This proposed change is consistent with historical and current NRC staff requirements, as reflected in the NRC's improved Staadard Technical Specifications for Westinghouse Reactors (NUREG-1431, Revision 1) and is, therefore, acceptable.
Currently the channel calibration surveillance requirements for items 2.b.,5.,6., and 23. of BVPS-1 TS Table 4.3-1 are designated as "N.A."(not app: cable). The proposed change for these surveillance requirements to a required frequency of at least once per 18 months with the provision that the neutron flux detectors may be excluded from channel calibration. Adding these periodic channel calibration requirements to the noted BVPS-1 channels is appropriate to ensure adequate surveillance testing of these channels and is acceptable since these changes would make the BVPS-1 surveillance requirements for the affected channels consistent with the BVPS-2 surveillance requirements for similar channels.
The proposed changes to correct page numbers in the BVPS-2 TS Index pages is purely administrative and is, therefore, acceptable.
The NRC staff has no objection to the corresponding changes to the TS Bases for both units.
3.0 STATE CONSULTATION
in accordat.ce with the Commissio_n's regulations, the Pennsylvania State official was notified of the proposed issuance of the amendments. The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATIQH The amendments change a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and change surveillance requirements. The NRC staff has determined that the amendments involve 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 the amendments involve no significant hazards consideration, and there has been no public comment on such finding (63 FR 19969). Accordingly, the amendments meet 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 the amendments.
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5.0 CONCLUSION
The Commission has 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, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor: D. Brinkman Date:
May 28, 1998
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