ML20055G027
| ML20055G027 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 07/06/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20055G026 | List: |
| References | |
| GL-89-13, NUDOCS 9007200069 | |
| Download: ML20055G027 (2) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION -
'[g WASHINGTON, D, C,20666
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NOS.132 AND 107 TO L
FACILITY OPERATING LICENSE NOS. DPR-51 AND NPF-6 t
ENTERGY OPERATIONS..INC.
ARKANSAS NUCLEAR ONE. UNIT NOS. 1.AND 2 L
DOCKET NOS. 50-313 AND 50-368 INTRODUCTION By letter dated April 10, d90, Arkansas Power and Light Company requested amendments to the Technical Specifications (TSs) appended to Facility-Operating License Nos. DPR-51 and NPF-6 for Arkansas Nuclear One, Units 1 and 2 (ANO-182).
The licensee proposed changes in the TSs which would allow the use of bioc' ides other than just chlorine for controlling biological fouling of the service water i-systems at.ANO-1&2.
DISCUSSION Surveillance Requirements (SRs) 4.5.2.1.2 and 4.6.2.3, for ANO-1 and 2 respectively', specify the addition of chlorine to the Service Water (S$)
during performance of the flow verification surveillance and with the SW temperature between 60'F and 80"F. During flow verification testing, chlorination of. the SW is required to prevent buildup of Asian Clams in the containment cooler cooling coils when SW is pumped through them. The temperature range represents the range in which Asian Clams can spawn and produce larvae which could pass through the SW system intake flow strainers.
Historically, the addition of this chemical has effectively controlled the buildup of Asian Clams in the SWs with minimal effect on the piping system.
The-licensee plans to implement use of biocides other than gaseous chlorine for l
biological fouling control. The licensee stated that there are other biocides that are as equally effective than chlorine for this purpose such as bromine.
These other biocides generally do not have operational problems or personnel hazards associated with chlorine gas, and are no more destructive to the SW system piping and equipment than chlorine.
In some cases, these biocides even reduced corrosion concern associated with the SW piping and equipment.
Furthermore, the NRC's Generic Letter 89-13, " Service Water System Probins Affecting Safety-Related Equipment", dated July 18, 1989, recogn17ed the use of equally effective biocides in the recommended program to resolve the issue of fouling of open-cycle service water systems.
oOO7200069 900706 DR ADOCK 0500 3
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EVALVATION The licensee is requesting that the specific references to chlorination requirements be-rodified to allow flexibility in the use of equally effective biocides. The staff has reviewed and concluded that, based on the information provided above, the proposed changes are acceptable. However, regarding the use of biocides, the licensee should take all necessary precautions to obey federal, state and local environmental regulations.
r ENVIRONMENTAL CONSIDERATION The amendments involve a change in a requirement with respect to the installa.
tion or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes in surveillance requirements. The staff L
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 th31 there is no significant increase in individual or L
cumulative occupational i <!ation exposures. The 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. Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forthin10CFRSection51.22(c)(9). Pursuantto10CFR51.22(b),noenvironmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
CONCLUSION The staff has concluded, based on the considerations discussed above, that:
will not be enda'ngered by operation in the proposed manner, and (2) public (1) there is reasonable assurance that the health and safety of the such activities will be conducted in compliance with the Commission's regulations,
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and the issuance ofLthe amendments will not be inimical to the common defense and security or to the health and safety of _the public.
Date:
July 6, 1990 Principal Contributor:
L. Tran M
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