ML20248L089
| ML20248L089 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 06/05/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20248L088 | List: |
| References | |
| NUDOCS 9806100415 | |
| Download: ML20248L089 (2) | |
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1 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30e06 4001 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION TECHNICAL SPECIFICATIONS CHANGES CAROLINAPAWER311GBT_COMPXY BRUNSWICK STEAM ELECTRIC PLANT. UNITS 1 AND 2 DOCKET NO.50-324.325
1.0 INTRODUCTION
By letter dated April 3,1998, Carolina Power & Light Company (CP&L), the licensee, requested an amendment to Facility Operating Licer,se Nos. ' DPR-71 and DPR-62 for the Brunswick Steam Electric Plant (BSEP) Units 1 and 2. The amendment would revise the specified minimum volume of the Condensate Storage Tank (CST) from 150,000. gallons to 228,200 gallons. This is to ensure that 50,000 gallons of water is available for Core Spray System (CSS) operation as specified by the staff in its SER issued on May 26,1986.
2.0 EVALUATION During power operation, High Pressure Coolant injection (HPCl) and Reactor Core Isolation Cooling (RCIC) pumps take their suction from the CST, and the Suppression Pool is the back-up source. As required by the Technical Specifications (TS),100,000 gallons of water in the CST are dedicated for HPCI and RCIC operation, but for the CSS pumps, the Suppression Pool is the normal suction source and the CST is the back-up. The current TS Bases 3/4.5.3.1 CORE SPRAY SYSTEM (CSS) requires assurance of the availability of 50,000 gallons of water for the CSS. When the Suppression Pool is inoperable, a total of 150,000 gallons of water are reserved for RCIC, HPCI and CSS.
During a recent review of industry operating experience, CP&L determined that, with the system as at present, the CST volume requirement contained in TS 3.5.3.1 LIMITING CONDITION FOR OPERATION would not assure the availability of 50,000 gallons of water for the CSS as indicated in the TS Bases Section 3/4.5.31, which indicates that the water in CST needs to last for about 5 minutes with both CSS pumps operating at full capacity of 5000 gpm.
The CSS pump suction connection to the CST is about 10 feet above the bottom of the tank to assure that RCIC and HPCI have sufficient water of 100,000 gallons exclusively for their operation. This requirement is not changed. The proposed change puts the requirement for all three systems, CSS, HPCl, and RCIC at 150,000 gallons, in addition, the licensee has determined that adequate suction without vortices to the CSS pump would require CST volume to be maintained above 178,200 gallons. This is now increased to 228,200 gallons to accommodate the propos9d change of guaranteeing 50,000 gallons for CSS.
9906100415 980605 PDR ADOCK 05000324 Y.
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TS CHANGES The proposed TS changes increase the requirements for water volume in the CST from 150,000 gallons to 228,200 gallons. The minimum system capacity for the CSS specifed by the staff SER issued in 1986 is only 50,000 gallons.
Unit 1 and Unit 2, Page B 3/4 5-2, TS Bases 3/4.5.3.1 -In the present bases, there is no l
mention of allowance for air ingestion. The proposed new revision accounts for air ingestion and increases the requirement from 150,000 gallons of water to 228,200 gallons of water. CSS air ingestion is not expected to occur above the level which corresponds to a CST volume of l
178,200 gallons. The proposed changes are conservative and therefore are acceptable.
Unit 1 and Unit 2, Page 3/4 5-4, TS 3.5.3.1.b.2.b - 150,000 gallons is changed to 228,200 gallons. Based on the foregoing, this is acceptable.
3.0 STATE CONSULTATION
in accordance with the Commission's regulations, the State of North Carolina 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. 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 exposuie. %e 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 25103). 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 Be amendments.
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: George Thomas, SRXB, DSSA Date : ' June 5,1998 1
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