ML20207N291
| ML20207N291 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 12/30/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20207N286 | List: |
| References | |
| NUDOCS 8701140102 | |
| Download: ML20207N291 (2) | |
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UNITED STATES i
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NUCLEAR REGULATORY COMMISSION D
J;J WASHINGTON, D. C. L:555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGtlLATION SUPPORTING AMENDPENT NO. 93 TO FACILITY OPERATING LICENSE NO. DPR-30 COMMONWEALTH EDISON COMPANY AND IOVA-ILLINOIS GAS AND ELECTRIC COMPANY OtfAD CITIES NUCLEAR POWER STATI(d.. UNIT 2 DOCKET NO. 50-265 1
1.0 INTRODUCTION
Ry letter dated October 28, 1086, the licensee for Quad Cities Nuclear Power Station, Unit 2, requested changes to the technical specifications with regard to the Standby Liouid Control System (SLCS). The proposed changes reflect the licensee's plan to increase the concentration of sodium pentaborate in the SLCS tank to 14 weight percent. This increase in concentration in con.iunction with the capability to operate both SLCS pumps simultaneously at a total combined flow rate of 80 gpm is proposed to satisfy, in part, the requirements of 10 CFR 50.62. The licensee also proposed a change to the minimum required liquid poison volume from 3470 gallons to 3321 gallons, and proposed to periodically test the SLCS pumps, one pump at a time.
?.0 EVAltfATION The changes proposed by the licensee have been reviewed by the staff aaainst the requirements of the ATWS rule (10 CFR 50.6?), and Generic letter 85-03
" Clarification of Equivalent Control Capacity for Standby liquid Control Systems" dated January 28, 1985. The licensee's proposed increase in sodium pentaborate concentration to 14 weight percent in conjunction with a flow rate of 80 gpm will provide a boa on content eouivalent in control capacity to 86 l
gpm of 13 weight percent sodium pentaborate. This is in compliance with l
10 CFR 50.62 and is therefore occeptable.
l The licensee's proposal that the liquid poison tank volume requirement be changed from a minimum of 3,470 gallons to a minimum 3,3?! gallons is acceptable because at the increased solution concentration of 14 wa.ight percent, 3,321 gallons provide the same total amount of poison and shut-down margin as the lower concentration / higher volume solution currently used.
The licensee's proposal to periodically test only ene SLCS system pump at a l
time instead of both pumps simultaneously is also acceptable. This is based upon the licensee's plan to perform initial two-pump tests, correlate single pump data to the initial two-pump data, and then compare the periodic single pump test data to the initial test data for verification of system capability.
8701140102 861230
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PDR ADOCK 05000265 P
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3.0 ENVIRONMENTAL CONSIDERATION
This amendment involves a change to 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 to the 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 public comment on such finding. Accordingly, this amendment 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 nor environmental assessment need be prepared in connection with the issuance of this amendment.
4.0 CONCLUSION
The technical specification changes proposed by the licensee are acceptable because they are consistent with the requirements of 10 CFR 50.62.
Furthermore we have 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, and (2) such activities will be conducted in compliance with the Commission's regulations, and 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:
T. Collins, T. Rotella Dated: December 30, 1986
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