ML20247A998

Forwards Insp Repts 50-327/89-14 & 50-328/89-14 on 890424-28 & Notice of Violation.Insp Determined That Plant Personnel Failed to Follow Established Procedures for Assuring Proper Voltage on Shutdown Boards

ML20247A998
Person / Time
Site:	Sequoyah
Issue date:	08/31/1989
From:	Liaw B Office of Nuclear Reactor Regulation
To:	Kingsley O TENNESSEE VALLEY AUTHORITY
Shared Package
ML20247B004	List: IR 05000327/1989014 ML20247A998 ML20247B006
References
NUDOCS 8909120301
Download: ML20247A998 (4)

See also: IR 05000327/1989014

Text

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UNITED STATES

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NUCLEAR REGULATORY COMMISSION

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...../ August 31, 1989

Docket Nes. 50-327

and 50-328

Mr. Oliver D. Kingsley, Jr.

Senior Vice President, Nuclear Power

Tennessee Valley Authority

6N 38A Lookout Place

1101 Market Street

Chattanooga, Tennessee 37402-2801

Dear Mr. Kingsley:

SUBJECT: NOTICE OF VIOLATION, NRC SPECIAL INSPECTION REPORT ON SEQUOYAH

SHUTDOWN BOARD OVERV0LTAGE (NRC INSPECTION REPORT NOS. 50-327/89-14

A*fD50-328/89-14)

This refers to the Nuclear Regulatory Commission (NRC) team inspection conducted

at the Sequoyah Nuclear Plant on April 24 through April 28, 1989. The inspection

was announced by letter dated March 7, 1989. The inspection was conducted to

determinn the adequacy of procedures for managing overvoltage conditions and

also to ettermine whether current plant procedures were adequately implemented

to protect sensitive electrical equipment from damage that would result from

overvoltage. An overvoltage condition existed at the Sequoyah site during diesel

testing on January 21, 1989 during which the Tennessee Valley Authority (TVA)

took no immediate corrective actian. The NRC staff discovered this overvoltage

condition on January 22, 1989 when TVA reported to the staff the failure of

diesel generator 2A-A to limit tre.:1ent overvoltage on the shutdown' boards to

within the Technical Specification limits during load rejection testing.

Previous overvoltage conditions at the site from 1980 through 1986 were identi-

fied in TVA's corrective action program included in the Employee Concerns Special

Programs Element Report 30202.

The inspection determined (1) that plant personnel failed to follow established

procedures, and (2) that some procedures provided inadequate instructions to

plant personnel for assuring proper voltage en the shutdown boards. Furthennore,

the analysis perfonned in conjunction with Element Report 30202 to assess the

effects of overvoltage on the electrical equipment was inadequate, and the root

cause of overvoltage events was not properly recognized in order to ensure adequate

corrective action. The staff's concerns about the Element Report are considered

inspector followup items.

The failure to follow established procedures is a violation of NRC requirements.

Please include in your response to Violation 50-327/89-14-01, 50-328/89-14-01 a

discussion on how the inadequate procedures identified in Section 6.1 of the

inspection report contributed to the violation and what actions you have taken

to correct this situation. The violation, reference to pertinent requirements,

and elements to be included in your response are described in the enclosed Notice

of Violation.

OFoi

8909120301 890831

PDR 'fI

t O ADOCK 05000327

PDC  ;

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Mr. Oliver D. Kingsley, Jr. . -2-

At the ' conclusion of the inspection, these findings were discussed with those

members of your staff identified in the enclosed inspection report.

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In accordance with Section 2.790 of the NRC's " Rules of Practice," Port 2

Title 10, Code of Federal Regulations, a copy of this letter, its enclosure,

and any reply will be placed in the NRC's Public Document Room.

Should you have any questions concerning this letter, please contact us.

Sincerely

Original signed by

B. D. Liaw

B. D. Liaw, Director

TVA Projects Division

Office of Nuclear Reactor Regulation

Enclosure:

As stated

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• For previous concurrences

see previous ORC gm

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Mr. Oliver D. Kingsley, Jr. -3- August 31, 1989

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cc w/ enclosures:

General Counsel Mr. Kenneth M. Jenison l

Tennessee Valley Authority Senior Resident Inspector

400 West Sumit Hill Drive Sequoyah Nuclear Plant

ET 11B 33H U.S. Nuclear Regulatory Comission

Knoxville, Tenrassee 37902 2600 Igou Ferry Road ,

Soddy Daisy, Tennessee 37379  !

Mr. F. L. Moreadith i

Vice President, Nuclear Engineering Mr. Michael H. Mobley, Director {

Tennessee Valley Authority Division of Radiological Health

400 West Sumit Hill Drive T.E.R.R. A. Building, 6th Floor

WT 12A 12A 150 9th Avenue North

Knoxville, Tennessee 37902 Nashville, Tennessee 37219-5404

Dr. Mark 0. Medford Dr. Henry Myers, Science Advisor

Vice President and Nuclear Comittee on Interior

Tecnnical Director and Insular Affairs

Tennessee Valley Authority U.S. House of Representatives

6N 38A Lookout Place Washington, D.C. 20515

Chattanooga, Tennessee 37402-2801

Tennessee Valley Authority

Manager, Nuclear Licensing Rockville Office

and Regulatory Affairs 11921 Rockville Pike

Tennessee Valley Authority Suite 402 l

SN 1578 Lookout Place Rockville, Maryland 20852

Chattanooga, Tennessee 37402-2801

Mr. John L. LaPoint

Site Director

Sequoyah Nuclear Plant

Tennessee Valley Authority

P. O. Box 2000

Soddy Daisy, Tennessee 37379

Mr. M. Burzynski

Site Licensing Manager

Sequoyah Nuclear Plant

P. O. Box 2090

Soddy Daisy, Tennessee 37379

County Judge

Hamilton County Courthouse

Chattanooga, Tennessee 37402

Regional Adatinistrator, Region II

U.S. Nuclear Regulatory Commission

101 Marietta Street, N.W.

Atlanta, Georgia 30323

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Mr. Oliver D. Kingsley, Jr. -4-

DISTRIBUTION:

Docket

NRC PDR

Local PDR

TVA Reading

ADSP Reading

TVA TP Reading

DCrutchfield

BDLiaw

RPierson

BWilson, Region II

LWatson, Region II

BGrimes, NRk

FMiraglia, NRR

SBlack

JDonohew

Edordan, AEOD

ACRS(10)

OGC

Inspection Team Members

MSimms

TQuay

BZalcman

FPaulitz

EMarinos

1

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