ML20079A107
| ML20079A107 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 12/21/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20079A104 | List: |
| References | |
| NUDOCS 9412300158 | |
| Download: ML20079A107 (4) | |
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UNITED STATES y
E NUCLEAR REGULATORY COMMISSION f
WASHINGTON, D.C. 2006H001
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS.159 AND 163 TO FACILITY OPERATING LICENSE NOS. OPR-24 AND DPR-27 WISCONSIN ELECTRIC POWER COMPANY POINT BEACH NUCLEAR PtANT. UNIT NOS. 1 AND 2 DOCKET NOS. 50-266 AND 50-301
1.0 INTRODUCTION
By letter dated September 12, 1994, Wisconsin Electric Power Company, the licensee, proposed to amend the Point Beach Nuclear Plant (PBNP), Unit Nos.1 and 2, Technical Specifications (TSs). The proposed amendment would modify TS 15.3.3, " Emergency Core Cooling System, Auxiliary Cooling Systems, Air Recirculation Fan Coolers, and Containment Spray," by incorporating allowed outage times similar to those contained in NUREG-1431, Revision 0, " Westing-house Owner's Group Improved Standard Technical Specifications" (ISTS), and by clarifying the operability requirements for the service water pumps. The proposed changes would also clarify the completion times for placing a unit in hot or cold shutdown, if a limiting condition for operation cannot be met.
In addition, the licensee proposed changes to the related bases to ensure consistency and clarity.
2.0 EVALUATION 2.1 TS 15.3.3.A.2 The allowed outage times (A0Ts) and the unit shutdown requirements related to accumulators and safety injection (SI) pumps are being modified. The A0Ts are being increased from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and the shutdown requirements are being changed from 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> to reach hot shutdown, and from 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> l
to 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> to reach cold shutdown.
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The proposed 72-hour A0Ts are consistent with the current staff position, represent a reasonable time to repair a component, and are consistent with i
ISTS. Therefore, the proposed A0Ts are acceptable. The proposed 6-hour period to reach hot shutdown is reasonable, based on operating experience, so that plant systems are not challenged, and is consistent with current staff positions and ISTS. Therefore, the hot shutdown requirement is acceptable.
The proposed 36-hour period to reach cold shutdown is a reduction in the allowed time stated in the PBNP custom TSs. This change is acceptable because it is conservative, and is bounded by the current staff position.
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2.2 TS 15.3.3.A.3 i
The A0Ts and the unit shutdown requirements related to residual heat removal (RHR) pumps, heat exchangers and valves (A0Ts only) are being modified. The A0Ts are being increased from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for the pumps and valves, j.
and from 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for the heat exchangers. The requirement to i
reach hot shutdown is being changed from 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for both pumps and l
j heat exchangers. The requirement to maintain the reactor coolant between 350 "F and 500 *F after an additional 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is being modified to maintain a temperature between 350 'F and 540 'F, immediately upon entering the j
condition.
l The proposed 72-hour A0Ts for the RHR components are consistent with the 2
current staff position, represent a reasonable time to repair a com)onent, and l
are consistent with ISTS. Therefore, the proposed A0Ts are accepta)1e..The proposed 6-hour period to reach hot shutdown is reasonable, based on operating i
experience, so that plant systems are not challenged, and is consistent with
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current staff positions and ISTS. Therefore, the hot shutdown requirement is acceptable.
i The upper bound of the temperature band for the reactor coolant is being changed from 500 *F to 540 'F.
This change brings the temperature range into agreement with the hot shutdown mode definition in the custom PBNP TSs and l
with the PBNP design bases, correcting an error in the TSs. Therefore, it is acceptable. The change in the time to be in the specified temperature range i
is acceptable, because it is conservative and consistent with current operating practice at PBNP.
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2.3 TS 15.3.3.B.2 i
The A0Ts and the unit shutdown requirements related to containment fan i
coolers, spray pumps and associated valves are being modified. The A0T is i
being increased from 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for a spray pump, and from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 1
to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for a valve. The shutdown requirements related to the coolers, pumps and valves are being changed from 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> to reach hot shutdown, and from 48 to 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> i.o reach cold shutdown.
In addition, an exception related to valves out-of-service is being deleted.
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The 72-hour completion time takes into account the redundant heat removal j
capability provided by the containment spray and cooler systems, provides a reasonable time for repairs, and is consistent with the current staff position and with ISTS. Therefore, the completion time is acceptable.
The proposed 6-hour period to reach hot shutdown is reasonable, based on operating experience, so that plant systems are not challenged, and is consistent with current staff positions and ISTS. Therefore, the hot shutdown requirement is acceptable. The proposed 36-hour period to reach cold shutdown is a reduction in the allowed time stated in the PBNP custom TSs. This change is acceptable, because it is conservative and is bounded by the current staff position.
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l The removal of the valve out-of-service exception is acceptable, because it will no longer apply since the A0Ts for the pumps and the valves will be the same.
2.4 TS 15.3.3.D.1 The requirement for four service water (SW) pumps to be operable is being modified to state that two pumps from each train must be operable. This is a conservative change which ensures redundancy and is consistent with ISTS.
Therefore, the change is acceptable.
In addition, the footnote which was only applicable during the Fall 1994 refueling outage is being removed. As this is an administrative change only, it is acceptable.
2.5 TS 15.3.3.D.2 The unit shutdown requirements related to SW pumps, valves and associated components are being modified. The requirements are being changed from 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> to reach hot shutdown, and from 48 to 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> to reach cold shutdown.
The proposed shutdown requirements are reasonable, based on operating experience, to reach the required conditions in an orderly manner without challenging plant systems, and are consistent with ISTS. Therefore, they are acceptable.
2.6 Bases for TS 15.3.3 The staff agrees with the licensee, that the proposed changes to the bases are consistent with and support the above changes.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the Wisconsin State official was notified of the proposed issuance of the amendment. The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
This 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 effluent 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 (59 FR 53844). Accordingly, this amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR SI.22(b), no environmental impact statement or environmental assessment-need be prepared in connection with the issuance of this amendment.
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5.0 CONCLUSION
The staff 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 this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
A. Hansen l
Date: December 21, 1994 i
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