ML20205F141

Forwards Addl Info to Clarify Existing Inadequate Core Cooling Instrumentation & Proposed Upgrade Described in Util 840426 & 870112 Submittals,Per 870303 & 11 Telcons W/Nrc

ML20205F141
Person / Time
Site:	Beaver Valley
Issue date:	03/18/1987
From:	Sieber J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TASK-2.F.2, TASK-TM TAC-45114, NUDOCS 8703310097
Download: ML20205F141 (5)

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'Af Telephone (412) 393-6000

("d,'[j up March 18, 1987 Shippingport, PA 15077-0004 U. S.

Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555

Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 NUREG-0737, Item II.F.2, ICC Instrumentation System Gentlemen:

By telephone conference on March 3

and 11,

1987, the NRC requested additional information to clarify the existing Inadequate Core Cooling Instrumentation (ICCI) and the proposed upgrade described in our April 26, 1984 and January 12, 1987 submittals.

Attachment 1

provides a

summary of Beaver Valley submittals on ICCI.

A.

Existing System The existing ICCI system consists of three separate subsystems as follows:

Reactor Vessel Level Indication System (RVLIS)

Subcooling Margin Monitor (SMM)

Core exit Thermocouples (CETC)

The existing RVLIS is a microprocessor-based system that provides reactor vessel level indication to flat panel displays and a recorder.

(See December 30, 1980 submittal)

The existing SMM is a microprocessor-based system that provides the margin to saturation on an analog display.

In addition,

pressure, temperature and saturation temperature for existing pressure is available on a digital display located on the monitor (See April 21, 1983 submittal).

The existing CETC system utilizes the plant computer as the primary display with a Honeywell precision Temperature Indicator and a backup.

(See April 21, 1983 submittal)

B.

Upgrade System our April 24, 1984 and January 12, 1987 submittals described an upgrade to the ICCI system that was presented to the NRC in a meeting on March 1, 1984.

v 9703310097 870310 PDR ADOCK 05000334 g

p PDR

Bdzvar Vollcy Powar Station, Unit No. 1 Docket No. 50-334, Licensa No. DPR-66 ICC Inctrum:ntation System Page 2 i

The upgrade will consist of removing the existing RVLIS, SMM and Honeywell Precision Temperature indicator and installing two Westinghouse ICC-68 ICC monitors (See Figure 1).

Inputs to each monitor will include dedicated temperature l

(including CETC),

pressure, level (RVLIS) and reactor coolant pump status.

A plasma display for each monitor, purchased to IEEE 323-74, IEEE 344-75 and IEEE 384-77 standards, will be used as the primary display (s) for reactor vessel level and subcooling margin.

In

addition, these plasma displays will be used as the backup CETC j

indication.

Attached to the January 12, 1987 submittal are some typical display pages.

The Train A monitor will also provide signals to a 3-pen recorder i

for reactor vessel level.

Compensated CETC signals will be provided from each monitor to the plant computer systems.

The Safety Parameter Display System (SPDS) will be used as the primary display for the CETC as described in the April 24, 1984 submittal.

i If you have any questions on this information, please contact my office.

i Very truly yours, i

)

. D. Sieber Vice President, Nuclear I

Attachment 1

1 4

l

Bhav3r Valley Powar Station, Unit No. 1 Dockst No. 50-334, Licanes No. DPR-66 ICC Instrumentation System Page 3 cc: Mr. W. M. Troskoski, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. Nuclear Regulatory Commission Regional Administrator Region 1 631 Park Avenue King of Prussia, PA 19406 Mr. Peter S. Tam U.

S. Nuclear Regulatory Commission Project Directorate No. 2 Division of PWR Licensing - A Washington, DC 20555

- Mail Stop 340 Addressee only Director, Safety Evaluation & Control Virginia Electric & Power Company P.O. Box 26666 One James River Plaza Richmond, VA 23261

e o

ATTACHMENT 1

ICCI SUBMITTALS DATE SUBJECT January 12, 1987 Schedule, Upgrade Unit 1 and Unit 2 differences.

April 2, 1984 Generic Letter 82-28, Response to Request for Information dated February 3, 1984 December 16, 1983.

September 13, 1983 RVLIS Schedule April 21, 1983 Supplemental response to Generic Letter 82-28.

March 25, 1983 Generic Letter 82-28 May 24, 1982 Confirmatory Action Letter 82-06.

April 28, 1982 RVLIS Schedule December 30, 1981 CETC Criteria for RVLIS September 30, 1981 Response to request for information dated August 5, 1981.

September 2, 1981 July 1, 1981 CETC Criteria April 15, 1981 ICCI evaluation checklist.

March 20, 1981 Installation of SMM December 31, 1980 Response to NUREG-0737, description of ICCI December 17, 1980 Schedule March 19, 1980 SMM Design June 13, 1980 SMM Design November 28, 1979 SMM

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