ML20088A496
| ML20088A496 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/27/1984 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20088A494 | List: |
| References | |
| NUDOCS 8404120119 | |
| Download: ML20088A496 (3) | |
Text
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8 UNITED STATES NUCLEAR REGULATORY COMMISSION h
j WASHINGTON, D. C. 20555 e
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMEN 0 MENT NO. 54 TO FACILITY OPERATING LICENSE NO. NPF-6 ARKNiSAS POWER A LIGHT COMPANY ARKANSAS NUCLEAR ONE, UNIT 2 DOCKET NO. 50-368 Introduction By letter dated December 15, 1983, Arkansas Power & Light Company (the licensee or AP&L) requested an amendment to Facility Operating License No.
NPF-6 for operation of Arkansas Nuclear One, Unit 2 (ANO-2), located in Pope County, Arkansas.
The proposed changes to ANO-2 Technical Specification 3.8.2.3 and 4.8.2.3.1 are requested to reflect current industry standards and practices, ANO-2 specific design parameters, and limits previously approved by the NRC. The development of these proposed changes was based on NUREG-0452, Revision.4.
The proposed changes will not affect the safety of plant operation nor alter the ability of the D.C. power systems to perform as described in the FSAR.
Evaluation The following are the bases for proposed chances to the Standard Technical Specifications to incorporate ANO-2 plant specific conditions.
(1) 3.8.2.3 ANO-2 has an additional full capacity charger which can be nanually operated in the event the dedicated charger becomes inoperable. For this reason, the phrase "its associated full capacity charger" in the Standard Technical Specification was changed to "a full capacity charger" in the proposed specification for Trains "A" and "B" and, therefore, it is acceptable.
(2) 3.8.2.3, Action b-The phrase "until an operable charger is resti, red to the affected bank" was added in the technical specification. We discussed with the licensee the basis of the added phrase and found that the phrase was added to clarify the action statement.
It is our interpretation of the action statorent without the phrase that the action statenent does not apply when an operable charger is restored to the affected bank. He have discussed this interpretation with the licensee and he has acreed that the additional phrase is not needed. Therefore, Technical Specification 3.8.2.3 Action b is in accordance with STS and is acceptable.
8404120119 840327 PDR ADOCK 05000368 P
. (3) 4.8.2.3.1.b The licensee proposed to delete the 92 days Surveillance Requirement of the Standard Technical Specification which reeds "There is no visible corrosion at either terminal or connections r the connection resis-tance of these items is less than 150 x 10-6 ohms."
The li&rdee states that a precise and accurate method for measuring cell-to-cell and terminal connection resistance with the cells in service and on float has not been identified.
The ANO-2 battery and bus design does not include disconnects or isolation devices which t
allow performing the above surveillance while batteries are in service.
Based on our evaluation of the licensee's system, we approve deletion of the requirement te measure terminal or connect. ion resistance at the 92-day surveillance test interval. "' ever, the licensee is required to perform the visual inspection by ver1 ; ng that there is no visible corrosion at least'once per 92 days and therefore, as agreed by the licensee, the following phrase should be added to the Surveillance Requirement of ANO-2 technical specification Section 4.8.2.3.1.b (There.is no visible corrosion at either terminals or connections.)
(4) 4.8.2.3.1.C.3 The licensee's clarification that cell-to-cell and terminal connection resistance do not include connecting cabling resistance between multiple racks and/or tiers of cells is acceptable.
(5) 4.8.2.3.1.C.4 The staff had previously approved the design capacity of the battery charger to supply at least 200 amperes as described in the FSAR. The proposed AND-2 technical specification to specify the battery charger j
supplying 200 amperes for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is in accordance with STS and.there-i fore acceptable.
(6) Table 4.8-2 Battery Surveillance Requirements Standard Technical-Specifications.(STS) are based on manufacturer's reconmended full charge specific gravity of-1.215. The manufacturer's recommended value for full charge specific gravity for the ANO-?
hatteries is 1.210.
Thus,'the appropriate test criteria for Category A testing is greater than or equal to.l.195 and for Category B testing is greater than or equal to 1.190 (greater than 1.200.for the average of all connected cells). The proposed values of Table 4.8-2 as stated above for the technical specification of ANO-2 conforn with the intent of the limits stated in the-STS and are, therefore, acceptable.
--T T
7 1
M 3-(7) 4.8.2.3.d, e and f The proposed battery capacity test (18 month intervals) and the per-formance discharge test of the batteries (60 months intervals) comply with the STS and are, therefore, acceptable.
Based on the foregoing discussions, the staff finds the proposed changes acceptable.
Environmental Consideration We have deternined that the amendment does not authorize a change in effluent types or total-amounts nor an increase in power level and will not result in any significant environmental impact. Having made this determination, we have further concluded that the amendment involves an action which is in-significant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d).(4),'that an environmental impact statement or negative declaration and-environmental inpact appraisal need not he prepared in t
connection with the issuance of this amendment, a
Conclusion We have concluded, based on the considerations discussed above, that:
(1) there is reasor.able assurance that the health and safety of the public Rill not be endangered by operation in the proposed manner, and (2) such x
1 activities will be conducted in compliance with the Commission's regulations i
and-the issuance of this amendment will not be inimical to the common defense s
an'd security or to the health and safety of the public.
4
,s Date:
March 2/, 1984, s
PNncipal Contributor:
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