ML20138R671

Summary of 851105 Meeting W/Util & Snupps at Site Re Proposed Mods to Low Temp Overpressure Protection Sys. Attendee List & Slides Used During Presentation Encl

ML20138R671
Person / Time
Site:	Callaway
Issue date:	11/07/1985
From:	Alexion T Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8511180733
Download: ML20138R671 (8)

Text

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/ 4 UNITED STATES 8 N NUCLEAR REGULATORY COMMISSION 5 ;y WASHINGTON, D. C. 20555

\*****/ NOV 0 71985 .-

Docket No.: 50-483 LICENSEE: Union Electric Company FACILITY: Callaway Plant, Unit 1

SUBJECT:

MINUTES OF MEETING WITH UNION ELECTRIC REGARDING PROPOSED MODIFICATIONS TO THE LOW TEMPERATURE OVERPRESSURE PROTECTION (LTOP) SYSTEM AT CALLAWAY On November 5, 1985, representatives of the Union Electric Company and SNUPPS met with the staff to discuss proposed modifications to the LTOP system at Callaway. Meeting attendees are listed in Enclosure 1. Slides used during the presentation are in Enclosure 2.

_ The meeting began with some background discussion. On December 28, 1984, the licensee responded to License Condition 2.C.(12) and proposed that reliance on administrative controls with the addition of alarm circuits provided ade-quate protection to satisfy LTOP concerns at Callaway. The staff approved the licensee's proposal on July 30, 1985. License Condition 2.C.(12) states that within one year of receiving staff approval of the modifications, the licensee shall have the approved modifications installed.

The licensee informed the staff that they have identified a problem with imple-menting the alarm circuitry as described in their December 28, 1984 submittal.

That submittal describes the addition of an alarm circuit to certain RHR/RCS suction isolation valves such that if the valves are open or do not have power available and the interlock activation setpoint is reached, the alarm would initiate on the main control board. This ensures that the valves are closed as pressure increases past the interlock activation setpoint. The problem arises at higher power and pressure levels when power to the valves is locked out to prevent inadvertent or spurious opening of the valves. At this point, the "no power" input to the alarm circuitry activates the alarm. Although the audible portion of the alarm can be cleared, the light on the control board will remain.  ;

The licensee is now considering a new proposal to satisfy LTOP concerns. The new proposal would have an alarm circuit that would initiate only if the valves are open and the interlock activation setpoint is reached. In addition, valve status will be obtained directly from the valve instead of from the motor control center as in the original proposal.

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9511180733 851107 PDR ADOCK 05000483 P PDR l

Nov 0 71986 The staff stated that the new proposal appears to be acceptable at their review level, however they cautioned that the ultimate decision rests with th_eir manage-ment. The licensee stated that they did not expect to obtain staff approval at this time. Rather, they were interested in any feedback the staff had to offer l

so that any staff concerns would be addressed in their formal submittal, cur-rently expected in about I week. The licensee desires to have staff approval of their new proposal by the end of this year so they can begin implementing the modifications at their first refueling outage, currently scheduled to begin on March 1, 1986.

CRIGINAL SIGED BY:

i Thomas W. Alexion, Project Manager

< Licensing Branch No. I Division of Licensing

Enclosures:

As stated cc: See next page DISTRIBUTION:

See attached page i

LB#1/ [ LB#1/DL' !

TAlexion /mac g BJYoungblood 11/7/85 11/(/7/85 I

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Mr. D. F. Schnell Union Electric Company Callaway Plant Unit No. 1 NOV 0 71995 cc: ..

Mr. Nicholas A. Petrick Executive Director - SNUPPS Mayor Howard Steffen 5 Choke Cherry Road Chamois, Missouri 65024 Rockville, Maryland 20850 Professor William H. Miller Gerald Charnoff, Esq. Missouri Kansas Section, American Thomas A. Baxter, Esq. Nuclear Society Shaw, Pittman, Potts & Trowbridge Department of Nuclear Engineering 1800 M Street, N. W. 1026 Engineering Building Washington, D. C. 20036 University of Missouri Columbia, Missouri 65211 Mr. J. E. Birk Assistant to the General Counsel Mr. Robert G. Wright Union Electric Company Assoc. Judge, Eastern District Post Office Box 149 County Court, Callaway County, St. Louis, Missouri 63166 Missouri Route #1 Fulton, Missouri 65251 U. S. Nuclear Regulatory Comission Lewis C. Green, Esq.

Resident Inspectors Office Green, Hennings & Henry RR#1 Attorney for Joint Intervenors Steedman, Missouri 65077 314 N. Broadway, Suite 1830 St. Louis, Missouri 63102 Mr. Donald W. Capone, Manager Nuclear Engineering Mr. Earl Brown Union Electric Company School District Superintendent Post Office Box 149 Post Office Box 9 St. Louis, Missouri 63166 Kingdom City, Missouri 65262 A. Scott Cauger. Esq. Mr. Harold Lottman Assistant General Counsel for the Presiding Judge, Dasconade County Route 1 Missouri Public Service Comm.

Post Office Box 360 Owensville, Missouri 65066 Jefferson City, Missouri 65101 Mr. John G. Reed Ms. Marjorie Reilly Route #1 Energy Chairman of the League of Kingdom City, Missouri 65262 Women Voters of Univ. City, M0 7065 Pershing Avenue Mr. Dan I. Bolef, President University City, Missouri 63130 Kay Drey, Representative Mr. Donald Bollinger, Member Board of Directors Coalition for the Environment Missourians for Safe Energy St. Louis Region 6267 Delmar Boulevard 6267 Delmar Boulevard University City, Missouri 63130 University City, Missouri 63130

c NOV 0 71985 Callaway Plant Unit No. 1 cc: ~

Regional Administrator ,

U. S. NRC, Region III i 799 Roosevelt Road Glen Ellyn, Illinois 60137 i Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P. O. Box 176

! Jefferson City, Missouri 65102 Mr. Glenn L. Koester 1

Vice President - Nuclear i

Kansas Gas and Electric Company 201 North Market Street Post Office Box 208 Wichita, Kansas 67201 l

Eric A. Eisen, Esq.

Birch, Horton, Bittner and Moore

_ Suite 1200

, 1155 Connecticut Avenue, N. W.

Washington, D. C. 20036 I

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ENCLOSURE 1 PROPOSED MODIFICATIONS TO THE LTOP --

- SYSTEM AT CALLAWAY .

NOVEMBER 5, 1985  !

NAME ORGANIZATION Dave Shafer UE Bill Robinson UE Mark Crain UE Jim Riley SNUPPS Tom Alexion NRC/DL Vincent Leung NRC/DSI Ed Lantz NRC/DSI l

i Sammy Diab NRC/DSI l t

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MEETING

SUMMARY

DISTRIBUTION NRC Participants NRC PDR L PDR NSIC PRC System T. Alexion LB#1 Reading File Project Manager T. Alexion ntz M. Rushbrook S. Diab Attorney, OELD R. Hartfield*

OPA*

OTHERS bec: Applicant & Service List

• Caseload Forecast Fanel Visits l