ML20046C827

Provides Summary & Status of Licensing Actions Worked on During 1993 Refueling Outage & Implementation of Actions Associated W/Tac Numbers M85370,M56110,M56111,M79912 & M82749 for Plant

ML20046C827
Person / Time
Site:	Calvert Cliffs
Issue date:	07/26/1993
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Denton R BALTIMORE GAS & ELECTRIC CO.
References
TAC-M56110, TAC-M56111, TAC-M79912, TAC-M82749, TAC-M85370, NUDOCS 9308120247
Download: ML20046C827 (5)

Text

.,

.~

~

@ Moy

' f 2, t-UNITED STATES

. ra -

-NUCLEAR REGULATORY COMMISSION -

WASHINGTON, D.C. 20555-0001

...e July 26, 1993 Docket Nos. 50-317 1

and 50-318 Mr. Robert E. Denton Vice President - Nuclear Energy Baltimore Gas & Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-4702

SUMMARY

AND STATUS OF LICENSING ACTIONS WORKED ON DURING THE 1993 REFUELING OUTAGE AND IMPLEMENTATION OF ACTIONS ASSOCIATED WITH TAC NOS. M85370, M56110, M56111, M79912, AND M82749 - CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 By letter dated July 12, 1993, Baltimore Gas and Electric Company (BG&E)-

provided to the NRC staff a summary of the licensing actions completed during-the Unit 2 refueling outage which ended on June 11, 1993,. including the status of some licensing actions which have not been fully implemented. The six items discussed in your letter and their status are:

NRC Bulletin 90-01. Sucolement 1. Rosemount Transmitters - Unit 2-(TAC No. M85370)

All Unit 2 Rosemount transmitters were replaced by May 12, 1993, with

. transmitters manufactured after July 11, 1989. All actions required by TAC No, M85370 have been completed and the TAC will be closed.

NRC Generic Letter 88-17. Loss of Decay Heat Removal - Unit 2 (TAC No M697311-The modifications completed on Unit 2 included reactor coolant system.(RCS)

I wide range level indication and alarms, control room shutdown cooling flow alarm, control room low pressure safety injection' suction pressure indications, and a core exit thermocouple audible alarm.

The RCS narrow-range level indication was installed; however, circuit noise problems were encountered during the acceptance testing.

By letter dated June 7,.1993, BG&E indicated that four methods of determining level currently exist.

Your bases for delaying the final testing necessary to complete this action are:

i 9308120247 930726 PDR ADDCK 05000317 P

PDR

. y E FiE CENT B COPY g,C M

W D m m-m w

y

y

.p Mr. Robert E. Denton 1.

The RCS narrow-range instrument was not utilized during the remainder of the recent outage since no additional mid-loop operations were planned.

The instrument will not be used until the next outage involving mid-loop operations.

2.

The RCS narrow-range instrument is only one of several independent and diverse means for monitoring RCS level when approaching or operating in mid-loop conditions. Other means include the reactor vessel level monitoring system, the reactor vessel refueling pool level indication, the new wide-range reactor vessel instrument, and the tygon tube level indicator.

3.

The potential economic costs of extending the outage exclusively to troubleshoot and repair the RCS narrow-range instrument, whose near-term use was not needed for the remainder of the recent outage, was not justified in view of the fact that existing instrumentation was sufficient to assure safe operations with reduced RCS inventory (mid-loop operation).

The RCS narrow-range level indication testing will be completed during the next outage of sufficient duration that involves entry into mid-loop operation, but no later than the next refueling outage (RF0-10) for Unit 2 which will be in the spring of 1995.

Retailed Control Room Desian Review - Human Enaineerina Deficiencies (HEDs) -

Unit 1 (TAC No. M56110) and Unit 2 (TAC No. M56111)

All required modifications for both units have been completed including the enhanced lighting for the control room.

Details were also provided for three HEDs which were cancelled based on BG&Es reevaluation during the Unit I refueling outage in the spring of 1992. The disposition of these HEDs was found acceptable by the NRC staff in its letter dated December 8, 1992. All actions related to TAC Nos. M56110 and M56111 for Units 1 and 2, respectively, have been completed and the TACs will be closed.

Station Blackout (SBO) Rule. 10 CFR 50.63. Implementation - Unit 1 (Tac No.

M68525) and Unit 2 (Tac No. M68526)

All SB0 modifications, with the exception of the addition of the two new emergency diesel generators (EDGs), have been completed.

The modifications included providing DC - powered indication to some isolation valves and providing AC power via the inverters to the reachr vessel level monitoring systems.

In addition, modifications have been made to the control room drop ceiling and temperature monitors have been added to the battery rooms. The addition of the EDGs is scheduled for completion in 1996.

p I

Mr. Robert E. Denton July 26, 1993 Containment Instrument Tubing Seismic Modifications - Unit 2 (TAC No. M79912)

The modifications necessary to bring the unit's containment pressure instrument tubing line supports into conformance with the Updated Final Safety Analysis Report seismic analysis have been completed. All actions related to TAC No. M79912 have been completed and the TAC will be closed.

Weld Repair to Unit 2 Refuelina Water Storace Tank (RWST) - Unit 2 (TAC No. M82749)

By letter dated March 20, 1992, the NRC staff granted temporary relief from the American Society of Mechanical Engineers (ASME) Code requirement to repair a leak in the unit's RWST until the recent refueling outage during which the required ASME Code repair was completed. All actions related to TAC No.

M82749 have been completed and the TAC will be closed.

Sincerely, Daniel G. Mcdonald, Senior Project Manger Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page

1 Mr. Robert E. Denton Calvert Cliffs Nuclear Power Plant Baltimore Gas & Electric Company Unit Nos. I and 2 cc:

Mr. Michael Moore, President Mr. Joseph H. Walter Calvert County Board of Engineering Division Commissioners Public Service Commission of 175 Main Street Maryland Prince Frederick, Maryland 20678 American Building 231 E. Baltimore Street D. A. Brune, Esquire Baltimore, Maryland 21202-3486 General Counsel Baltimore Gas and Electric Company Kristen A. Burger, Esquire P. O. Box 1475 Maryland People's Counsel Baltimore, Maryland 21203 American Building, 9th Floor 231 E. Baltimore Street Jay E. Silberg, Esquire Baltimore, Maryland 21202 Shaw, Pittman, Potts and Trowbridge 2300 N Street, NW Patricia T. Birnie, Esquire Washington, DC 20037 Co-Director Maryland Safe Energy Coalition Mr. G. L. Detter, Director, NRM P. O. Box 33111 Calvert Cliffs Nuclear Power Plant Baltimore, Maryland 21218 1650 Calvert Cliffs Parkway Lusby, Maryland 20657-47027 Resident Inspector c/o U.S. Nuclear Regulatory Commission P. O. Box 287 St. Leonard, Maryland 20685 Mr. Richard I. McLean Administrator - Radioecology Department of Natural Resources 580 Taylor Avenue Tawes State Office Building B3 Annapolis, Maryland 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406

7 4

Mr. Robert E. Denton July 26, 1993 Containment Instrument Tubina Seismic Modifications - Unit 2 (TAC No. M79912)

The modifications necessary to bring the unit's containment pressure instrument tubing line supports into conformance with the Updated Final Safety Analysis Report seismic analysis have been completed. All actions related to TAC No. M79912 have been completed and the TAC will'be closed.

kleld Renair to Unit 2 Refuelina Water Storace Tank r-Unit 2 (TAC No, M82749) 3 By letter dated March 20, 1992, the NRC staff granted porary relief from the American Society of Mechanical Engineers (ASME) Code requirement to repair a leak in the unit's RWST until the recent refueling outage during which the required ASME Code repair was completed. All actions related to TAC No.

M82749 have been completed and the TAC will be closed.

Sincerely, Original signed by:

Daniel G. Mcdonald, Senior Project Manger Project Directorate I-I Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

See next page DISTRIBUTION:

Docket File NRC & Local PDRs PDI-l Reading SVarga JCalvo RACapra CVogan DMcDonald OGC ACRS (10)

JWermiel, 8/H/3 RJones, 8/E/21 REckenrode, 10/0/24 l

AJ RhlSRXB d&kJf PDI-1:D

??

h.

e PPMlfDA PDI-1:PMh NRhNICB l

f CVoganhe DMcDonald: avl JWehmiel RIones REdenrode RACapra 7/8//93 07 /# /93 7 /20/93 7/p/93 7 /J//93 7 S6/93 OfflCIAL RECORD COPY FILENAME: G:\\CCl-2\\CC85370.LTR i

)