ML20138N925

Confirms Plans for AEOD Proposed Site Visit on 851113 to Discuss Info Re 850923 Partial Draindown of Reactor Vessel. List of Attendees Provided.Proposed Agenda Encl

ML20138N925
Person / Time
Site:	River Bend
Issue date:	10/28/1985
From:	Butler W Office of Nuclear Reactor Regulation
To:	William Cahill GULF STATES UTILITIES CO.
References
NUDOCS 8511060159
Download: ML20138N925 (5)

Text

"

y Docket No. 50-458 -

Mr. William J. Cahill, Jr.

Senior Vice President River Bend Nuclear Group Gulf States Utilities Company Post Office Box 2951 Beaumont, Texas 77704 ATTN: Mr. J. E. Booker

SUBJECT:

PROPOSED SITE VISIT - NOVEMBER 13, 1985

. This is to confirm our plans to have staff members from the NRC Office of Analysis and Evaluation of Operational Data (AE0D) visit the River Bend Station on November 13, 1985. The purpose of the visit is to collect and discuss infor-mation on an operating event which occurred on September 23, 1985 involving a partial draindown of -the River Bend Station reactor vessel.

The detailed agenda for this visit is delineated in the enclosure to this letter. The proposed NRC attendees at this visit are Messrs. S. Rubin and P. Lam of AE00. The visit would last from 7:30 a.m. to 3:30 p.m. on i November 13, 1985.

Please inform NRC Project Manager, Stephen Stern, if there is a need to change the schedule for the proposed visit, whether the staff could use photographic equipment on the visit as well as any clarification or further discussion of 4

this topic.

Sincerely, j Orfgoal Signc(1 by

Walter R. Butler, Chief i

Licensing Branch No. 2 1 Division of Licensing

Enclosure:

As stated cc: Resident, River Bend . DISTRIBUTION J. Jaudon, Region IV *iDocketcf11e4 E. Johnston, Region IV NRC PDR P. Tam, AEOD Local PDR S. Rubin, AE00 PRC System K. Seyfrit, AEOD NSIC l LB#2 Reading EHylton i SStern j LDewey, OELD f

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OCT 2 81985 Docket No. 50-458 4

Mr. William J. Cahill, Jr.

Senior Vice President -

River Bend Nuclear Group Gulf States Utilities Company Post Office Box 2951 -

Beaumont, Texas 77704 ATTN: Mr. J. E. Booker

SUBJECT:

PROPOSED SITE VISIT - NOVEMBER 13, 1985 ,

This is to confirm our plans to have staff members from the NRC Office of Analysis and Evaluation of Operational Data (AEOD) visit the River Bend Station on November 13, 1985. The purpose of the visit is to collect and discuss infor-mation on an operating event which occurred on September 23, 1985 involving a partial draindewn of the River Bend Station reactor vessel.

The detailed agenda for this visit is delineated in the enclosure to this letter. The proposed NRC attendees at this visit are Messrs. S. Rubin and P. Lam of AE0D. The visit would last from 7:30 a.m. to 3:30 p.m. on November 13, 1985.

Please inform NRC Project Manager, Stephen Stern, if there is a need to change the schedule for the proposed visit, whether the staff could use photographic equipment on the visit as well as any clarification or further discussion of this topic.

Sincerely.

Walter R. Butler, Chief -

Licensing Branch No. 2 ,

Division of Licensing

Enclosure:

As stated cc: Resident, River Bend J. Jaudon, Region IV E. Johnston, Region IV P. Tam, AE0D S. Rubin, AE00 K. Seyfrit, AE0D

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j Mr. William J. Cahill, Jr.

l Gulf States Utilities Company River Bend Nuclear Plant cc:

1 Troy B. Conner, Jr. , Esq. Ms. Linda B. Watkins/Mr. Steven Irving Conner and Wetterhahn Attorney at Law d}

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1747 Pennsylvania Avenue, NW Washington, D.C. 20006 355 Napoleon Street Baton Rouge, Louisiana 70802 -

Mr. William J. Reed, Jr. Mr. David Zaloudek d Director - Nuclear Licensing Nuclear Energy Division Gulf States Utilities Company Louisiana Department of

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P. O. Box 2951 Environmental Quality .

Beaumont, Texas 77704 P. O. Box 14690

s. Baton Rouge, Louisiana 70898

,i Richard M. Troy, Jr. , Esq.

Assistant Attorney General in Charge Mr. J. David McNeill, III ,

State of Louisiana Department of Justice William G. Davis, Esq. .

,i 234 Loyola Avenue Department of Justice i:

New Orleans, Louisiana 70112 Attorney General's Office 7434 Perkins Road Resident Inspector Baton Rouge, Louisiana 70808 P. O. Box 1051 St. Francisville, Louisiana 70775 H. Anne Plettinger 3456 Villa Rose Drive Gretchen R. Rothschild Baton Rouge, Louisiana 70806 Louisianians for Safe Energy, Inc.

1659 Glenmore Avenue Baton Rouge, Louisiana 70775 James W. Pierce, Jr., Esq.

P. O. Box 23571 i: Baton Rouge, Louisiana 70893 ru Regional Administrator, Region IV --

U.S. Nuclear Regulatory Commission Office of Executive Director i Jor Operations n

611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 ie .

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Proposed Topics for Discussion for River Bend Plant Visit __

Purpose:

To collect and discuss information on the operating event on 9/23/85 involving the draindown of the reactor vessel.

Specific areas of interest for review / discussion / collection of information:

1. Tour the River Bend reactor building to visually examine the installation arrangements and elevation of the LPCI and RHR shutdown cooling pipings and isolation valves.

2. Review and collect P& ids on the RHR system and its subsystems (LPCI and shutdown cooling) and drawings involving the ele-

. vation and configuration of the refueling cavity and spent fuel .

pool.

3. Discuss and obtain detailed step-by-step sequence of events relating to the vessel draindown event on 9/23/85. Obtain procedures used for valve manipulations prior to and during this event. -

Discuss the independent verification practices related to the verification of procedural steps for valve manipulations prior to and during the event.

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4. Obtain information on operability requirements / practices far containment isolation function when in cold shutdown /refurling modes. Discuss operability requirements for emergency cr e cooling systems when in these modes. Also discuss automatic actuation systems operability during these modes.

5. Discuss draindown rate (RCS level drop rate) and time available for operator actions as well as automatic actuation levels relative to the event.

6. Discuss the plant's implemented responses to IE Information Notice 84-81 and GE SIL 388. *

7. Review and discuss the plant's implemented corrective actions to prevent recurrence of the referenced operating event.

8. Visit the control room to walk through the (simulated) valve manipulations and indications available to the operator to diagnose the draindown and to aid in preventing recurrences.

9. Disuss the interlocks' to prevent valve line-ups which can cause draindowns. Discuss the absence of interlocks which allowed this event to occur.

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10. Discuss the potential incorporation of additional interlocks to j prevent recurrence.

11. Discuss the vessel head status (in place, being removed, removed) and vessel flooding status for this event and potential statuses of these parameters for other situations when similar valve

misalignments (and vessel draindowns) might occur as permitted _

by T.S. and operating procedures.

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