ML19289E834

Updates 790511 Ltr Re Emergency Feedwater Sys.Discusses Verification of Sys & Progress of post-TMI Operator Training Program

ML19289E834
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/21/1979
From:	Trimble D ARKANSAS POWER & LIGHT CO.
To:	Reid R Office of Nuclear Reactor Regulation
References
1-059-29, 1-59-29, NUDOCS 7905290155
Download: ML19289E834 (3)

Text

• 'L~~- g ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK, ARKANSAS 72203 (501)371-4000 May 21,1979 1-059-29 Director of Nuclear Reactor Regulation ATTN: Mr. Robert W. Reid, Chief Operating Reactors Branch #4 U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Subject:

Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 May 11, 1979 Letter Update (File: 1510)

Gentlemen:

To provide a continued update to the NRC staff regarding progress made in implementing the commitments made in our May 11, 1979 letter and to address comments of the staff as a result of the May 17, 1979 Order, the following is provided.

Item (a)

The Emergency Feedwater (EFW) system capacity has been verified to be consistent with Technical Specification requirements and in accordance with recent B&W accident analyses. Specifically, previous requirenents for EFW total capacity were quoted as 624 GPM, the latest B&W analyses requires 550 GPM while actual test data taken during initial plant startup indicate a minimum 672 GPM capability during accident condition assumptions. Therefore, the EFW system flow capability is consistent with accident analysis assumptions. All of the above information except the B&W analysis i'ow assumptions, was provided in detail in our May 17, 1979 letter.

As a result of staff concerns, we will perfom a test on the EFW system to demonstrate Integrated Control Systen (ICS) override capability and controllability of EFW flow independent of ICS, verify the minimum EFW flow capability is conservative with respect to the accident analyses, and verify the operability of the EFW flow indication devices described in our May 17, 1979 letter. This test procedure is currently being developed and will be telecopied to you on May 22, 1979. The procedure will be available for inspection by your I&E inspector.

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Mr. Robert W. Reid May 21,1979 To provide documentation on the operator training program, the following infonnation is submitted.

The operator training program has included:

(a) A lh hour lecture given by the plant training section on the chronology of the TMI-2 incident and interim recommen-dations on proper operator actions such as those given by B&W.

(b) B&W simulator training which involved approximately lh to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of classroom training on the sequence of events at TMI-2, a 1/2 hour demonstration of the significant portions of the event, and 2-2h hours of hands-on training in a TMI scenario. Seventeen individuals have completed this program.

The renaining ten people will complete the training on May 22 and 23,1979.

(c) Approximately 1-lh hours of training on emergency pro-c'!dures that have changed as a result of the TMI incident.

Etaphasis was placed on the immediate actions and the changed portions of the procedures. This lecture was given by the plant training staff.

(d) Approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of training on the guidelines received from B&W following their small breaks analysis, the proce-Uural changes made as a result of the small breaks analysis, and the design changes that are being made to the plant.

This training was given by the plant training staff.

The following evaluation methods have been used to measure the effec-tiveness of the training program.

(a) A sixteen question exam was given to the operators.

Seventeen individuals received scores above 90%.

None of the operators received a score of less than 80%. The exam was reviewed by a member of the NRC Audit Team onsite on May 21, 1979.

(b) NUS Inc. conducted an audit of the training program and its effectiveness. This included interviews with a cross section of six operators. The initial results of the audit were favorable. The results will be made available to the NRC Audit Team.

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Mr. Robert W. Reid May 21,1979 (c) B&W also conducted an audit of the training progran and interviewed six operators. The initial results of this audit were favorable. The results will be made available to the NRC Audit Team.

Very truly yours, b & f. VYb David C. Trimble Manager, Licensing DCT/ew 204/ 201