ML20033G008

Forwards Safety Evaluation Allowing Facility to Enter Mode 6 W/Only 1 Operable Source Range Channel.Entry Accomplished on 900326

ML20033G008
Person / Time
Site:	Sequoyah
Issue date:	03/27/1990
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
Shared Package
ML20033G009	List: ML20033G008 ML20033G010
References
TAC-76360, NUDOCS 9004040269
Download: ML20033G008 (4)

Text

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I March 27, 1990

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Ddcket Nos. 50 327 l

t Mr. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power t

Tennessee Valley Authority

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6N 36A Lookout Place 1101 Market Street i

Chattanoo9a, Tennessee 37402 2801

SUBJECT:

REGIONAL WA!YER OF COMPLIANCE, INOPERAELE SOURCE PANGE MONITORS I

(TAC 76360). SEQUOYAH NUCLEAR PLANT, UNIT 1 1

On March 25, 1990, your staff requested discretionary enforcement with respect to the Sequoyah, Unit 1. Technical Specifications (155) to allow i

Unit 1 to enter reactor operational Mode 6 refueling operations, without two l

operable source range nuclear instrumentation channels. The unit was shutdown in Mode 5, Cold shutdown, with two of the three available channels inoperable and was meetin for shutdown (g the appropriate action statement for the inoperable channels i.e., Action 5 for TS Table 3.31). Limiting Condition for t

Operation (LCO) 3.0.4 of the TSs does not allow entry of the unit into an

' operational mode' unless the condition for all applicable LCOs are met without relying on provisions in the associated action statements. With the inoperable channels, tie unit could not meet TS 3.9.2 in Mode 6 without relying on the associated action statements.

Therefore, the TSs did not allow the unit to move from Mode 5 to Mode 6 without two operable source range channels.

Your verbal request to waive compliance with LCO 3.0.4 to allow Unit I to enter r

Mode 6 was followed by a letter dated March 26, 1990.

This letter documented i

the justification for your request which was provided to the staff on March 25, l

1990.

Because the Unit I entry into Mode 6 is on the critical path to restart the unit from its Cycle 4 refueling outage and is judged to ae safe as documented in the enclosed Safety Evaluation, we approved the Waiver of Compliance at approximately 8:30 p.m. on March 25, 1990 to allow Unit 1 to enter Mode 6.

t This entry into Mode 6 was accomplished by the plant at 12:10 p.m. on March 26, t

1990. Although not required by LCO 3.9.2.,vou consnitted to have two source range channels operable prior to the removal of the reactor vessel head.

i Sincerely, Original signed by i

9004040269 900327 Dennis M. Crutchfield, Associate Director fDR ADOCK 03000327 for Special projects i

PDC Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation

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D6cket Nos. 50 327 f

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Mr. Oliver D. Kingsley, Jr.

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Senior Vice President, Nuclear Power l

Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402 2801

Dear Mr. Kingsley:

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SUBJECT:

REGIONAL WAIVER Of COMPLIANCE, INOPERABLE SOURCE RANGE MONIT0k$

(TAC 76360). SEQUOYAH NUCLEAR PLANT, UNIT 1 l

I On March 25, 1990, you verbally requested discretionary enforcement with respect to the Sequoyah, Unit 1, Technical Specifications (TSs) to allow i

Unit 1 to enter reactor operational Mode 6, refueling operations, without two operable source range nuclear instrunentation channels. The unit was shutdown i

in Mode 5, Cold Shutdomn, with two of the three available channels inoperable for shutdcwn (g the appropriate action statenent for the inoperable channels and was nettini.e., Action 5 for TS Table 3.31).

Limitino Condition for Operation (LCO) 3.0.4 of the TSs does not allow entry of t$e unit into an operational mode unless the condition for all applicable LCOs are net without rclying on provisions in the associated action statements. With the inoperable channels, the unit could not meet TS 3.9.2 in Mode 6 without relying on the associated action statements. Therefore, the TSs did not allow the unit to move from Mode 5 to Mode 6 without two operable source range channels.

Your verbal request to waive compitance with LCO 3.0.4 to allow Unit I to enter Mode 6 was followed by a letter dated March 26, 1990. This letter documented the justification for your request which was provided to the staff on March 25, 1990.

Because the Unit I entry into Mode 6 is on the critical sath to restart the unit f rom its Cycle 4 refueling outage and is judged to )e safe as documented in the enclosed Safety Evaluation, we approved the Waiver of Compliance at approxin.ately 8:30 p.m. on March 25, 1990 to allow Unit 1 to enter Mode 6.

This entry into Mode 6 was accomplished by the plant at 12:10 p.m. on March 26, 1990. Although not required by LCO 3.9.2. you committed to have two source range channels operable prior to the removal of the reactor vessel head.

Sincerely, Dennis M. Crutchfield, Associate Director for Special Projects Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation cc w/thclosure:

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Mr'. Oliver D, Kingsley, Jr.

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CCt General Counsel Mr. Kenneth M. Jenison f

Tennessee Valley Authority Senior Resicent inspecter 400 Wtst Sumit Hill Drive Sequoyah Nucitar Plant ET llB 33H U.S. Nuclear Regulatory Comission j

Knoxville, Tennessee 37902 2600 Igou Ferry Road l

Soddy Daisy, Tennessee 37379 Mr. F. L. Moreaditn Vice Presider.t. Nuclear [ngineering Pr. Michael H. Mobley, Director Tennessee Valley Authority Division of Radiological He&lth 400 West Sumit Hill Drive T.E.R.R. A. building, 6th Ploor V1 12A 12A 150 9th Avenue North Knoxville, Tennesset 37902 Nashville, Tennessee 37219 5404 i

Dr. Mark 0. Pedford Dr. Henry Myers. Science Aavisor Vice President and Nuclear Comittee on Interior i

Technical Director and Insular Affairs Tennessee Valley Authority U.S. House of Represent 6tives 6N SCA Lookout Place Washington, D.C.

20515 l

Chattanooga, Tennessee 37402-2801 Tennessee Valley /uthority Mr. Edward G. Wallace Rockville Office l

Manager, Nuclear Licensing 11921 Rockville Pike e

and Regulatory Af f airs Suite 402 Tennessee Valley Authority Rockville, Maryland 20852 l

SN 1578 Lookout Place Chattanooga, Tennessee 37402-2801 i

Mr. Joseph Bynum Acting Site Director Sequoyah huclear Plant Tennessee Yelley Authority P. O. Box 2000 Soddy Daisy, Tennessee 37379 l

Mr. Mark J. Burzynski Site Licensing Manager i

Sequoyah Nuclear Plant j

P. O. Box 2000 Sodcy Daisy, Tennessee 37379 l

1 County Judge i

Hamilton County Courthouse Chattanooga, Tennessee 37402 t

Regional Administrator, Region 11 I

U.S. huclear Regulatory Comission 101 Marietta Strtet N.W.

Atlanta, Georgia 30323 I

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