ML18033A387

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Requests Extension of Commitment Date Re Operability of Radioactive Effluent Instruments.List of Radioactive Effluent Monitors That Will Be Operable Prior to Unit 2 Fuel Load Encl
ML18033A387
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 09/27/1988
From: Gridley R
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8810060020
Download: ML18033A387 (11)
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Text

~RI ACCESSCON NBR:8810060020 DOC.DATE: 88/09/27 NOTARIZED: NO DOCKET FACIL,:50-259 Browns Ferry Nuclear Power Station, Unit 1, Tennessee 05000259 50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 50-297 North Carolina State Univ. PULSTAR Reactor 05000297 AUTH. NAME AUTHOR AFFILIATION GRIDLEY,R. Tennessee Valley Authority RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Requests extension of commitment date re operability of radioactive effluent instruments.

DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: OR Submittal: General Distribution NOTES:1 Copy each to: F.McCoy,J.G.Partlow, S.Richardson,S.Black, 05000259 B.D.Liaw.

1 Copy each to: S.Black, J.G.Partlow, S.Richardson 05000260 B.D.Liaw,F.McCoy. h RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL SIMMS,M 1 0 SNPD LA 1 0 SNPD PD 5 5 GEARSgG 1 1 SNPD PM 1 1 ADAMS,A 1 1 INTERNAL: ACRS 6 6 ARM/DAF/LFMB 1 0 NRR/DEST/ADS 7E 1 1 NRR/DEST/CEB 8H 1 1 NRR/DEST/MTB 9H NRR/DEST/ESB 8D NRR/DEST/RSB 8E NRR/PMAS/ILRB12 1

1 1

1 1 NRR/DOEA/TSB ll NUDOCS-ABSTRACT 1

1 1

1 1

1 O~HBS 1 0 OGC/HDS1 1 0 EG FILE 0 1 1 RES/DSIR/EIB 1 1 EXTERNAL: LPDR 1 1 NRC PDR 1 1 NSIC 1 1 R I

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TOTAL NUMBER OF COPIES REQUIRED: LTTR ~ ENCL SS

TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 5N 157B Lookout Place MP 87 $ le U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of Docket Nos. 50-259 Tennessee Valley Authority 50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) UNITS 1, 2, AND 3 REQUEST FOR EXTENSION OF COMMITMENT DATE-OPERABILITY OF RADIOACTIVE EFFLUENT INSTRUMENTS

Reference:

R. Gridley letter to NRC dated August 25, 1988 "Browns Ferry Nuclear Plant (BFN) Inoperable Radioactive Effluent Instruments" In the referenced letter, TVA provided NRC with a schedule for restoring the subject, instruments to operable status. During testing of a modification on the raw cooling water (RCW) monitors, a design problem was encountered. This problem affects both the RCW monitors and the residual. heat, removal.,serv,ice.

water (RHRSW) monitors.

The intent of the modification was to provide a downscale inoperable annunciation when the operate switch was moved from the operate mode. This modification resulted in the unintentional masking of a loss of "detector high voltage signal" to the same annunciator.

The circuit logic is being modified to correct this deficiency. This modification will be completed and the RHRSW and RCW monitors will be operable before fuel load. The required compensatory monitoring will continue until the monitors become operable.

Summary statements of commitments contained in this submittal including a list of instruments to be restored to operable status are provided in enclosure l.

The commitment for returning the other instruments to operable status, as listed in the referenced letter, remains unchanged.

88100S0020 ADDCI(

8809m'DR 05000259 PNU

,~l /k': a<a PD'P/P4 An Equal Opportunity ErnpIoyer

U.S. Nuclear Regulatory Commission 8RP S7eW If you have any questions concerning this submittal, please telephone Patrick Carier at (205) 729-2689.

Very truly yours, TENNESSEE VALLEY AUTHORITY R. Gridley, Manager Nuclear Licensing and Regulatory Affairs Enclosure cc: Enclosure Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockvi lie Pike Rockvi lie, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Browns Ferry Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611

ENCLOSURE 1 Commitment List The following is a list of radioactive effluent monitors that will be operable before fuel load of unit 2.

Operable Ins'trument Date

1) RCN monitor 1-90-132 Before Fuel Load, Unit 2
2) RCN monitor 2-90-132 Before Fuel Load, Unit 2
3) RCN monitor 3-90-132 Before Fuel Load, Unit 2
4) RHRSN monitor 1-90-134 Before Fuel Load, Unit 2
5) RHRSN monitor 2-90-133 Before Fuel Load, Unit 2
6) RHRSN monitor 2-90-134 Before Fuel Load, Unit 2

AC CELEMTED 'I8FRIBUTION DEN QNST TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8810060020 DOC.DATE: 88/09/27 NOTARIZED: NO DOCKET FACIL:50-259 Browns Ferry Nuclear Power Station, Unit 1, Tennessee. 05000259 50-260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260 50-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee AUTH. NAME AUTHOR AFFILIATION GRIDLEY,R. Tennessee Valley Authority RECXP.NAME RECIPIENT AFFILIATION 05000296'UBJECT:

Document Control Branch (Document Control Desk)

R Requests extension of commitment date re operability of radioactive effluent instruments. I DISTRIBUTION CODE: AOOID TITLE: OR COPIES RECEIVED:LTR Submittal: General Distribution

( ENCL / SIZE: 3 I

NOTES:1 'Copy'each to:'.McCoy,"J".G'.Partlow,-,'S'.Richardson,'S.Black, 05000259)('S B.D.Llaw.

1 Copy each to: S.Black, B.D.Liaw,F.McCoy.

J.G.Partlow, S.Richardson 05000260 /

1 Copy each to: S. Black, J.G.Partlow,S.Richardson 05000296 g B.D.Llaw,F.McCoy.

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL SIMMS,M 1 0 PD 5 5 GEARS,G 1 1 INTERNAL: ACRS 6 6 ARM/DAF/LFMB 1 0 NRR/DEST/ADS 7E 1 1 NRR/DEST/CEB 8H 1 1 NRR/DEST/ESB 8D .1 1 NRR/DE ST/MTB 9H 1 1 NRR/DEST/RSB 8E 1 1 NRR/DOEA/TSB 11 1 1 NRR/PMAS/ILRB12  :

1 1 DUC~BSTRACT 1 1 OGC/HDS2 1 0 01 1 1 RES/DSXR/EIB . 1 1 EXTERNAL: 'LPDR '<f 1 1 NRC 'PDR, (,( "' 1 NSIC NOTES 5 5 R'

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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 3740l 5N 157B Lookout Place IKP 27 I88 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Hatter of Docket Nos. 50-259 Tennessee Valley Authority 0-QO 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) UNITS 1, 2, AND 3 REQUEST FOR EXTEN N OF COMMITMENT DATE-OPERABILITY OF RADIOACTIVE EFFLUENT INSTRUMENTS

Reference:

R. Gridley letter to NRC dated August 25, 1988 "Browns Ferry Nuclear Plant (BFN) Inoperable Radioactive Effluent Instruments" In the referenced letter, TVA provided NRC with a schedule for restori.ng the subject instruments to operable status. During testing of.a modification on the raw cooling water (RCW) monitors, a design problem was encountered. Thi~

problem affects both the RCW monitors and the residual heat removal service water (RHRSW) monitors.

The intent of the modification was to provide a downscale inoperable annunciation when the operate switch was moved from the operate mode. This modification resulted in the unintentional masking of a loss of "detector high voltage signal" to the same annunciator.

The circuit logic is being modified to correct this deficiency. This modification wi be completed and the RHRSW and RCW monitors wi be operable 1 1 1 1 before fuel load. The required compensatory monitoring will continue until the monitors become operable.

Summary statements of commitments contained in this submittal including a list of instruments to be restored to operable status are provided in enclosure 1.

The commitment for returning the other instruments to operable status, as listed in the referenced letter, remains unchanged.

8810060020 80092/

PDR 'Onr'!( 05000 PNU gg. gag pggP/g(8 / I An Equal Opportunity Empioyer

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U.S. Nuclear Regulatory Commission SRP R7 $ ~8 If you have any questions concerning this submittal, please telephone Patrick Carier at (205) 729-2689.

Very truly yours,,

TENNESSEE VALLEY AUTHORITY R. Gridley, Manager Nuclear Licensing and Regulatory Affairs Enclosure cc: Enclosure Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One Nhite Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NN, Suite 2900 Atlanta, Georgia 30323 Browns Ferry Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611

ENCLOSURE 1 Commitment List following is a list of radioactive effluent monitors that will 4'The be operable before fuel load of unit 2.

Operable Instrument Oate

1) RCN monitor 1-90-132 Before Fuel Load, Unit 2
2) RCN monitor 2-90-132 Before Fuel Load, Unit 2
3) RCH monitor 3-90-132 Before Fuel Load, Unit 2
4) RHRSH monitor 1-90-134 Before Fuel Load, Unit 2
5) RHRSN monitor 2-90-133 Before Fuel Load, Unit 2
6) RHRSN monitor 2-90-134 Before Fuel Load, Unit 2
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