1CAN119010, Submits Revised Response to Generic Ltr 89-13, Svc Water Problems Affecting Safety-Related Equipment, Per

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Submits Revised Response to Generic Ltr 89-13, Svc Water Problems Affecting Safety-Related Equipment, Per
ML20058K035
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 11/30/1990
From: James Fisicaro
ENTERGY OPERATIONS, INC.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1CAN119010, GL-89-13, NUDOCS 9012070026
Download: ML20058K035 (2)


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November 30, 1990 1CAN119010 U. S. Nuclear Regulatory Commission Document Control Desk Mail Station P1-137 Washington, DC 20555

Subject:

. Arkansas Nuclear One - Unit 1 Docket Nos. 50-313 License Nos. DPR-51 Revision to Response to Generic Letter 89-13 Gentlemen:

Generic Letter 89-13, " Service Water Problems Affecting Safety-Related Equipment," required licensees to supply information about their service water systems to ensure the NRC of compi he with the General Design Criteria and requirements for quality assurance-in 10CFR, part 50, J W Appendix B and to confirm that the safety functions of their service water systems are being met. The Generic Letter was transmitted to Entergy Operations in the NRC's letter of July 18, 1989 (DCNA078922). Entergy

,0perations-provided a response to Generic Letter 89-13 in our letter of January .26,1990 (OCAN019012).

In the Generic Letter, three options were provided for Recommendation II -

Thermal Performance to verify the heat transfer capability of all safety-related heat exchangers cooled by Service Water.

1) Heat'exchangers, which are part of the Service Water system boundary but are not credited for heat transfer capability for a safe reactor shutdown,or accident response, require no test.
2) Periodic Maintenance consisting of disassembly, if required, and inspection of the heat exchanger at intervals as determined by.

inspection results.

3)- " Thermal Effectiveness" method.of determination of the actual heat transfer ef fectiveness of either the' hot or cold fluid.

In our-response to the Generic Letter, we categorized the test method for the Makeup Pump Room Coolers (VUC7A, VUC78 and VUC7C) as the " Thermal Effectiveness" method. Since that time, an evaluation based on engineering calculation has shown that these coolers are not required for

, a safe reactor shutdown or for accident response. Por the Generic Letter 9012070026 901130 ih PDR ADOCK 05000313 '

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' U -S. NRC

, November 30, 1990

. Page 2 guidance, a test is not required for these coolers under these circumstances. Because a test is not required per option 1, we have no plans to thermally test these three coolers, either as a specific one-time action or as part of our on-going program. We have, however, performed chemical cleaning and inspection on two of these coolers. The third is currently isolated with blank flanges. This has been discussed with Mr. Tom Alexion and Mr. Vernon Hodge of your Staff on November 28, 1990.

Should you or your' Staff have questions regarding this change, please do not hesitate to call.

Very truly yours,

. dk%

mes J. isicaro Manager, Licensing JJF/ CWT cci Mr. Robert Martin U. S. Nuclear Regulatory Commission Region-IV 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 NRC Senior Resident Inspector Arkansas Nuclear One - ANO-1 & 2 Number 1, Nuclear Plant Road Russellville, AR 72801 Mr. Tom Alexion NRR Project Manager, Region IV/ANO-1 U. S. Nuclear Regulatory Commission NRR Mail Stop 13-D-18 One White Flint North 11555 Rockville Pike Rockville, Maryland 20852 Ms..Sheri Peterson NRR Project Manager, Region IV/ANO-2 U. S. Nuclear Regulatory Commission NRR Mail Stop 13-D-18 One White Flint North 11555 Rockville Pike Rockville, Maryland 20852 Mr. C. Vernon Hodge NRR/0GCB U. S. Nuclear Regulatory Commission NRR Mail Stop 11-A-1 (Room 11F9)

One White Flint North 11555 Rockville Pike Rockville, Maryland 20852

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