ML20204E015

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Forwards Insp Repts 50-498/99-02 & 50-499/99-02 on 990110-0220.Expresses Concern Re Operator Errors Recently Noted at STP Electric Generating Station
ML20204E015
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 03/16/1999
From: Brockman K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To: Cottle W
HOUSTON LIGHTING & POWER CO.
Shared Package
ML20204E018 List:
References
50-498-99-02, 50-498-99-2, 50-499-99-02, 50-499-99-2, NUDOCS 9903240325
Download: ML20204E015 (5)
v • d • e


See also: IR 05000498/1999002

Text

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p or Ka% UNITED STATES

O t NUCLEAR REGULATORY COMMISSION

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REGION IV

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611 RYAN PLAZA DRIVE, SulTE 400

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[ ARLINGTON, TEXAS 76011-8064

MAR 161999

William T. Cottle, President and

Chief Executive Officer

STP Nuclear Operating Company

P.O. Box 289

Wadsworth, Texas 77483

SUBJECT: NRC INSPECTION REPORT NO. 50-498/99-02; 50-499/99-02

Dear Mr. Cottle:

This refers to the inspection conducted on January 10 through February 20,1999, at the South

Texas Project Electric Generating Station, Units 1 and 2, facility. The enclosed report presents

the results of this inspection.

We are concerned about the operator errors recently noted at your facility. During this

inspection period, troubleshooting / corrective maintenance activities being performed by

operators caused a plant trip and an uncontrolled reactivity increase. In both cases, existing

barriers were insufficient to preclude occurrence of these events. The plant trip involved

excersive reliance upon the skill of an individual rather than on an appropriately thought out

plan that was properly reviewed and supported by adequate procedural guidance. As was

noted in your problematic response to the June 1998 switchboard fire, electrical theory

knowledge deficiencies also contributed. The reactivity excursion associated with the moisture

separator work also demonstrated poor planning, an inadequate use of available indications,

and operator knowledge deficiencies.

In both cases, South Texas Project conducted an intrusive review of the circumstances leading

to the event and identified corrective actions which should help preclude similar recurrences.

However, it should be noted that knowledge deficiencies in the application of electrical theory

were recognized as a contributable factor to the September 1998 plant trip, and this deficiency I

'

has not been adequately ddressed.

In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter and its

enclosure will be placed in the NRC Public Document Room (PDR).

Should you have any questions concerning this inspection, we will be pleased to discuss them

with you.

Sincerely,

b /W'

en E. B m , Director

/ Division of Reactor Projects

9903240325 990316

PDR ADOCK 05000498

G PDR

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STP Nuclear Operating Company -2-

Docket Nos.: 50-498

50-499

License Nos.: NPF-76

NPF-80

Enclosure:

NRC Inspection Report No.

50-498/99-02;50-499/99-02

cc w/ enclosure:

T. H. Cloninger, Vice President

Engineering & Technical Services

STP Nuclear Operating Company - '

P.O. Box 289

Wadsworth, Texas 77483 l

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'

A. Ramirez/C. M. Canady i

City of Austin '

Electric Utility Department

721 Barton Springs Road

Austin, Texas 78704 l

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Mr. M. T. Hardt/Mr. W. C. Gunst J

City Public Service Board

P.O. Box 1771

- San Antonio, Texas 78296

D. G. Tees /R. L. Balcom

Houston Lighting & Power Company

P.O. Box 1700 i

Houston, Texas 77251

Jon C. Wood

Matthews & Branscomb

One Alamo Center

106 S. St. Mary's Street, Suite 700

San Antonio, Texas 78205-3692

Jack R. Newman, Esq.

Morgan, Lewis & Bockius

1800 M. Street, N.W.

Washington, D.C. 20036-5869

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. . . . ~ - -

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STP Nuclear Operating Company -2-

Docket Nos.: 50-498

50-499

License Nos.: NPF-76

NPF-80

Enclosure:

NRC inspection Report No.

50-498/99-02;50-499/99-02

cc w/ enclosure:

T. H. Cloninger, Vice President

Engineering & Technical Services

STP Nuclear Operating Company

P.O. Box 289

Wadsworth, Texas .77483

j A. Ramirez/C. M. Canady

l City of Austin

l Electric Utility Department

721 Barton Springs Road l

i Austin, Texas 78704 i

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Mr. M. T. Hardt/Mr. W. C. Gunst  !

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City Public Service Board

P.O. Box 1771- Q,,.,,

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San Antonio, Texas 78296 '

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D. G. Tees /R. L. Balcom I#-* ;d  ;

Houston Lighting & Power Company

, P.O. Box 1700  !

!

Houston, Texas 77251

Jon C. Wood

Matthews & Branscomb

One Alamo Center  !

106 S. St. Mary's Street, Suite 700 i

San Antonio, Texas 78205-3692

Jack R. Newman, Esq.

.. Morgan, Lewis & Bockius

l 1800 M. Street, N.W.

Washington, D.C. 20036-5869

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! STP Nuclear Operating Company -3-

Mr. G. E. Vaughn/Mr. C. A. Johnson

Central Power & Light Company.

P.O. Box 289 '

MailCode: N5012

Wadsworth, Texas 77483

INPO

Records Center .

l 700 Galleria Parkway )

Atlanta, Georgia 30339-5957.  !

Bureau of Radiation Control

State of Texas

' 1100 West 49th Street

Austin, Texas 78756

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Mr. Jim Calloway

l Texas Public Utility Commission

l William B. Travis Building

1701 North Congress Avenue

. P.O. Box 13326

! . Austin, Texas 78701-3326

John Howard, Director

Environmental and Natural Resources Policy

Office of the Governor ,

P.O. Box 12428 i

. Austin, Texas 78711 /d

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l ' Judge, Matagorda County ,

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L Matagorda County Courthouse

1700 Seventh Street

Bay City, Texas 77414

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STP Nuclear Operating Company -4-

E-Mail report to T. Frye (TJF)

E-Mail report to D. Lange (DJL)

E Mail report to NRR Event Tracking System (IPAS)

E-Mail report to Document Control Desk (DOCDESK)

E-Mail report to Richard Correia (RPC)

E-Mail report to Frank Talbot (FXT)

bec to DCD (IE01)

bec distrib. by RIV:

Regional Administrator Resident inspector

DRP Director DRS-PSB

DRS Director MIS System

Branch Chief (DRP/A) RIV File

Project Engineer (DRP/A) R. Bachmann, OGC (MS: 15-B-18)

Branch Chief (DRP/TSS)

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DOCUMENT NAME: R:\_STP\ST902RP.NFO

To receive copy of document, Indicate in box: "C" = Copy without enclosures "E" = Copy with enclosures *N" = No copy )

RIV: SRI RI l Ri l PE:DRP/A l C:DRP/A/ .

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STP Nuclear Operating Company -4-

E-Mail report to T. Frye (TJF)

E-Mail report to D. Lange (DJL)

E-Mail report to NRR Event Tracking System (IPAS) l

E-Mail report to Document Control Desk (DOCDESK)

E-Mail report to Richard Correia (RPC)

E-Mail report to Frank Talbot (FXT)

bec to DCD (IE01)

bec distrib. by RIV: l

Regional Administrator Resident inspector

DRP Directcr DRS-PSB

DRS Director MIS System

Branch Chief (DRP/A) RIV File

Project Engineer (DRP/A) R. Bachmann, OGC (MS: 15-B-18)

Branch Chief (DRP/TSS)

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DOCUMENT NAME: R:\_STP\ST902RP.NFO

To receive copy of document, Indicate in box: "c" = Copy without enclosures *E" = Copy with enclosurcs "N" = No copy j

RIV: SRI RI Rl PE:DRP/A C:DRP/Afl

NFO'Keefe WCSifre GLGuerra DBAllen JITapiaQCl4@

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