ML20206F610
| ML20206F610 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 06/13/1986 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20206F599 | List: |
| References | |
| NUDOCS 8606240535 | |
| Download: ML20206F610 (3) | |
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION L
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SAFETY EVAlt!ATION BY THE OFFICE OF NUCLEAR REACTOR REGt!LATION SUPPORTING AMENWENT NO. 2 TO FACILITY OPERATING LICENSE NO. NPF-43 DETROIT EDISON COMPANY FERMI-2 DOCKET NO. 50-341
1.0 INTRODUCTION
Durina battery testino in 1984, Detroit Edison (the licensee) discovered that the specific gravity of the electrolyte in its de batteries could not be maintained within the manufacturer's recommended nominal rance of 1.210.
To brinc the specific gravity of the cell electrolyte up to the nominal value of 1.210, acid was added to the cells using the manufacturer's recom-mended procedure. However, the actual specific gravity value achieved was 1.250 instead of the tarcet value of 1.210.
(A hiaher electrolyte specific gravity indicates a larger concentration of acid.) The licensee analyzed this matter in censultation with the battery vendor to determine the effect of this higher electrolyte specific gravity on the performance of the batteries. The results of this review indicated that the batteries' agina characteristics were still within the desian limits, but there was a possible reduction in battery life due to the higher specific gravity of the elec-trolyte. Accordingly, the specific gravity and related float voltage surveillance requirenents in the Fermi-2 Technical Specifications were proposed by the licensee for the original Technical Specifications to cor-respond with the actual electrolyte specific gravity of 1.250. Surveillance testing performed weekly and quarterly in accordance with the Femi-2 Tech-nical Specifications has demonstrated that the operability of the batteries has not been impaired by this higher specific gravity.
Due to the possible reduction in battery life mentioned above, the licensee is planning to replace both divisions of the original CAD type KC-17 batteries with the same type of batteries. The licensee will replace the Division I batteries during the current outage and will also attempt to replace the Division II batteries. Should the licensee he unable to replace the Division II batteries during the current outage due to insufficient time, they will be replaced by the end of the first refueling outage.
2.0 EVALUATION The licensee has proposed a revision to Table 4.8.2.1-1 in its letter dated May 5,1986, to reflect the changes in float voltage and specific gravity for the replacement (i.e., the new) batteries for Division I.
For Division II, the licensee proposes to add notes 7 and 8 to Table 4.8.2.1-1 to reflect the present values of specific gravity and float voltage parameters in the existing batteries if the replacement batteries are not installed in the current outage.
In this event, the values of these two parameters for the 8606240535 860613 PDR ADOCK 05000341 p
i 6 l Division II batteries will remain in effect for the first fuel cycle until the Division II batteries are replaced during the first refueling outape.
The replacement batteries (CAD Type KC-17) are the manufacturer's duplicates d
of those originally installed in the plant. The licensee states that the presently installed batteries as well as the replacement batteries meet the applicable reculatory requirements and have sufficient capacity to perform their required safety functions.
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Because there is no adverse impact on either the availability or the per-formance characteristics of the de batteries as a result of replacing the present batteries and the proposed changes in the related Femi-? Technical Specifications, we find that these proposed changes are acceptable.
We conclude, therefore, on the basis of the precedino discussion, that the proposed changes in the values of the float voltage and the specific gravity of the electrolyte of the replacement dc batteries in Specification 3/4.8.2 is acceptable. However, our conclusion on this matter is based on the requirement that if the Division II de batteries are not replaced during the current outage, they will be replaced prior to restart after the first refueling outage.
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3.0 ENVIRONMENTAL CONSIDERATION
This anendment involves a change in the installation and use of a facility l
component located within the restricted area as defined in 10 CFR Part 20 l
and changes in surveillance requirements. The staff has determined that this amendment involves no significant increase in the amounts, and no significant chance in the types, of any effluents which may be released offsite, and that there is no significant increase in individual or cumula-j tive occupational radiation exposure. The Commission has previously issued a proposed finding that this amendment involves no significant hazards con-sideration and there has been no public connent 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 or environmental assessment need be prepared in connection with the issuance of this amendment.
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4.0 CONCLUSION
The Comission made a proposed determination that the sub,1ect amendment involves no significant hazards consideration which was published in the Federal Register (51 FR 17692) on May 14, 1986, and consulted with the State of Michigan. No public comments were received, and the State of Michigan l
did not have any coments.
We have concluded, based on the considerations discussed above, that:
will not be endangered by operation in the proposed manner, and (2) publi (1) there is reasonable assurance that the health and safety of the such j
activities will be conducted in compliance with the Comission's regula-l tions and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
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Principal Contributor: Narinder Trehan, NRR Dated:
June 13,1986 l
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l AMENDMENT NO. 2 TO FACILITY OPERATING LICENSE N0. NPF a3 - FERMI, UNIT 2 DISTRIBUTION:
Docket No.-50-341 NRC PDR Local PDR PRC System NSIC BWD-3 r/f MDLynch (2)
EHylton EAdensam Attorney, OELD CMiles RDiggs JPartlow BGrimes EJordan LHarmon TRarnhard (4) l FEltawila EButcher
,