ML20056F483
| ML20056F483 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/20/1993 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20056F477 | List: |
| References | |
| NUDOCS 9308270305 | |
| Download: ML20056F483 (3) | |
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UNITED STATES ik NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D.C. 20555-0001 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT N0.17; TO FACILITY OPERATING LICENSE NO. DPR-66 AMENDMENT NO. ;; TO FACILITY OPERATING LICENSE NO. NPF-73 DUQUESNE LIGHT COMPANY OHIO EDISON COMPANY PENNSYLVANIA POWER COMPANY i
THE CLEVELAND ELECTRIC ILLUMINATING COMPANY THE TOLEDO EDISON COMPANY BEAVER VALLEY POWER STATION. UNIT NOS. 1 AND 2 DOCKET NOS. 50-334 AND'50-412
1.0 INTRODUCTION
By letter dated December 21, 1992, Duquesne Light Company (DLC) requested changes to the Beaver Valley Power Station, Units 1 and 2 Technical Specifications (TS) to allow the use of alternate source range monitors during refueling (Mode 6) as long as the required control room and containment indications are available.
Specifically, the proposed change would modify TS 3.9.2, " Instrumentation," to (1) allow the use of alternate monitors as long as the required visual and audible indications are available, and (2) allow installation of the upper internals when only one monitor with continuous visual indication in the control room is available. The current action statement suspending all operations involving core alterations or positive reactivity changes would be revised as Action "a".
Action "b" would be added to require a determination of the reactor coolant system (RCS) taron concentration at least once every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> when both monitors are inoperable or not operating.
2.0 EVALUATION l
During refueling (Mode 6), two operable monitors are required to provide redundancy during fuel movement or other actions that may cause positive reactivity changes, including upper internals removal. The proposed change would permit the use of alternate monitors in place of primary source range neutron flux monitors.
The alternate monitor (s) may be either an installed spare detector or a portable monitor with sufficient accuracy and sensitivity to provide neutron flux monitoring at a level consistent with the current TS requirements. The staff, therefore, finds this use of alternate monitors acceptable.
9308270305 930820 PDR ADDOK 05000334.
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. During installation of the upper internals, neutrons may be reflected back into the core resulting in a positive reactivity addition. However, this reactivity addition is so small when compared to the negative reactivity provided by the required shutdown margin that, in fact, the shutdown margin remains essentially unchanged.
In addition, since inadvertent control rod withdrawal is not a concern during upper internals installation, one primary or alternate source range monitor can adequately monitor the core neutron flux during this operation. Therefore, the proposed change requiring only one monitor with continuous visual indication in the control room during upper internals installation is acceptable.
The proposed action requiring a determination of the RCS boron concentration at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> when both of the source range monitors are inoperable or not operating is consistent with the standard Westinghouse TS and, therefore, acceptable.
It also eliminates the need for an exception to Specification 3.0.3, which requires placing the plant in a Mode in which the TS does not apply if a limiting condition for operation is not met.
The changes to Bases 3/4.9.2 adequately incorporate the above changes to TS 3.9.2 and are, therefore, acceptable.
Based on the review described above, the staff finds the proposed change to the Beaver Valley Units 1 and 2 TS to allow use of alternate source range monitors and installation of the upper internals when only one monitor is available are acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Pennsylvania State official was notified of the proposed issuance of the amendments.
The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
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 the 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 (58 FR 16223). 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 amendment 0.
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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:
L. Kopp Date: August 20, 1993 2
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