ML20209C143

Forwards Request for Addl Info Re Inoperable Status of Bypass Indication Sys.Util Should Provide Safety Evaluation Verifying That Use of Administrative Procedures,In Lieu of Automatic Means,Does Not Involve Unreviewed Safety Question

ML20209C143
Person / Time
Site:	Sequoyah
Issue date:	01/28/1987
From:	Youngblood B Office of Nuclear Reactor Regulation
To:	White S TENNESSEE VALLEY AUTHORITY
References
NUDOCS 8702040208
Download: ML20209C143 (3)

Text

, _ _ . . . ._ . - .

Dockdt Nos.: 50-327

. and 50-328 Mr. S. A. White 1 Manager of Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801

Subject:

Request for Additional Information on the Bypass Inoperable Status Indication System Enclosed is a request for additional information (RAI) on the Sequoyah bypass inoperable status indication (BISI) system. This RAI is the result of the staff 4

evaluation of information submitted by the Tennessee Valley Authority (TVA) and a telephone conference call held between representatives of TVA and members of the staff.

In addition to the enclosed RAI, TVA should also provide a safety evaluation which provides an adequate basis for the determination that the use of admin-istrative procedures, in lieu of automatic means, to determine the status of safety systems does not involve an unreviewed safety question. Referencing the previous 10 CFR 50.59 evaluation is unacceptable. Also, TVA should commit to compensatory actions and a firm schedule for the installation of the new i BISI system. Also a discussion of how the new BISI system confonus to the guidelines of Regulatory Guide 1,47 should be provided.

Although the staff does not need to complete this review prior to restart, there must be assurance that the compensatory measures are adequate. Therefore, i TVA should provide the requested information within 30 days of the date of this letter. If TVA cannot meet this date, it should provide its proposed schedule i within two weeks of the date of this letter.

If you require any additional assistance, olease contact the Sequoyah Project Manager, Joe Holonich, at (301) 492-7270.

Sincer ly, 8702040208 870128 ADOCK 050 7

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h gDR B.J. (oungblood, Director l PWR Project Directorate #4 Division of PWR Licensing-A

JISTRIEUTIM

Cnneket File N NRC PDR Local PDR PRC System l NSIC PWRf4 Reading PDuncan BJYcungblood Reading

TAlexion TVA0P (3) S. Richardson AR 5029 HDenton JTaylor EHayes GZech, RII NGrace LSpessard KBarr SAConnelly CMuller TNovak BJYoungblood JHolonich TKenyon FBurrows BKSingh KHooks WLong(10)

ACRS OGC-Bethesda JPartlow BGrimes EJordan MRe' hart, AR JThompson CU r t

! PWRhC R-A PW PW

.4hPWR-A PU- WR-A JHolnkch/ rad 'TAl xion MD n BJ gblood Olg,/87 Olg/87 01/Jf/87 01//,887

Y ENCLOSURE Question 1 Describe in detail the status boards used in keeping the operator aware of safety system status including the location and main responsible user.

Question 2 What aids are available to the operator for determination which safety systems are rendered inoperable when a supporting system is oeliberately bypassed?

Ouestion 3 Before removal or manipulation of a component that results in the unavailability of a safety system, do the procedures ensure that the status bcard has been changed to show the affected system as unavailable? Are there provisions included to prevent work from proceeding until the status board has been updated?

fuestion4 Is the status board updating included in a systeratic decumented system, sinilar to a document control system, so that updating is timely and the restoration to service is not complete until the status board has been updated?

Question 5 (a) Are simple alphanumeric characters used and readable from the intended viewing disterce?

(b) Are words, symbols, and abbreviations on the status boards corsistent with terms used in the rest of the plant?

(c) Is color coding, where used, consistent with color coding used elsewhere in tre plant?

Ouestion 6 In what way is the status board updated? Do the devices used for this purpose conform to human factors guidelines for controls, where applicable? Ubo is responsible for the updating?

Ouestion 7 Does the placement of the status board optimize ease of access for rersonel updating displays and ease of viewing for personnel reading the displays?

l Ouestion 8 Are the status board checks a part cf the shift turnover?

l Ouestion 9 Provide full justificatier for your proposed schedule (in 1990) for implementing the new bypassed and inoperable status indication (P!SI) system.

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L I , Fr. S.A. White Tennessee Valley Authority Sequoyah Nuclear Plant cc:

Terressee Department of Public Regional Acainistrator, Region II Health U.S. Nuclear Regulatory Corrission, ATTN: Director, Bureau of 101 Parietta Street, N.W. , Suite 2900 Environmental Pralth Services Atlanta, Georgia 30323 Cordell Hull Building

?!ashville, Tennessee 37215 J.A. Virkebo ATTN: D.L. Williams Mr. itichael H. Mobley, Director Tennessee Valley Authority Division of Radiolecical Health 400 West Suuait Hill Drive, W12 A12 T.E.R.R.A. Building Knoxville. Ternessee 37902 150 9th Avenue horth Nashville, Tennessee 372C3 Mr. Bob Faas Westinghouse Electric Coro. County Judge P.0. Box 355 Hamilton County Courthouse Pittsburch, Pennsylvania 15230 Chattanecga, Tennessee 37402 R. L. Gridley Tennessee Valley Authority SN 157B Lookout Flace Chattanooga, Tennessee .?7402-2801 ii. R. Harding Tennessee Valley Authority' Secuoyah Fuclear Plant P.O. Box 2000 Soddy Daisy, Tennessee 37379 Resident Inspector /Sequoyah NPS

. c/o U.S. Nuclear Regulatory Commission 2600 Igcu Ferry Roed Soddy Daisy, Tennessee 37275 H.L. Abercronbie Tennessee Valley Authority Sequoyah Nuclear Plant F.G. Box 2000 Soddy Daisy, Tennessee 3737c I

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