ML17251A218

Discusses 870714 Crdr Supplemental Rept Re Alarm Sys.Results of Study Indicated That Certain Alarm Sys Did Not Fall within Guidelines of NUREG-0700 & Required Sys Mods.Alarms Currently Scheduled for Installation by Sept 1988

ML17251A218
Person / Time
Site:	Ginna
Issue date:	08/02/1988
From:	MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	STAHLE C NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
RTR-NUREG-0700, RTR-NUREG-700 NUDOCS 8808120130
Download: ML17251A218 (4)

Text

i t AC CElZMTZD DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR:8808120130 DOC.DATE: 88/08/02 NOTARIZED-NO DOCKET g FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH.NAME AUTHOR AFFILIATION MECREDY,R.C.

Rochester Gas&Electric Corp.RECIP.NAME RECIPIENT AFFILIATION STAHLE,C.Document Control Branch (Document Control Desk)

SUBJECT:

Discusses CRDR alarm mods.DISTRIBUTION CODE: A003D COPIES RECEIVED:LTR I ENCL 0 SIZE: TITLE: OR/Licensing Submittal:

Suppl 1 to NUREG-0737(Generic Ltr 82-NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).

33 05000244 R RECIPIENT ID CODE/NAME PD1-3 LA STAHLE,C INTERNAL: ARM/DAF/LFMB NUDOCS-ABSTRACT RES/DSIR/EIB EXTERNAL: LPDR NSIC COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD1-3 PD NRR PQ/HFB 10~I 01 S/'DSTPl3 PY NRC PDR COPIES LTTR E CL 7 D I D A D TOTAL NUMBER OF COPIES REQUIRED: LTTR 18 ENCL (IIIIIIIIII jIIIIIIIIIIII iaaf 0 f>~ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y.14649.0001 August 2, 1988 TKLKRNONK AREA cooK 7i6 546-2700 U.S.Nuclear Regulatory Commission Document Control Desk Attn: Mr.Carl Stahle PWR Project Directorate No.1 Washington, D.C.20555

Subject:

Control Room Design Review (CRDR)Alarm Modifications R.E.Ginna Nuclear Power Plant Docket No.50-244

Reference:

Ginna CRDR Supplemental Report dated July 14, 1987

Dear Mr.Stahle:

As a part of the Control Room Design Review (CRDR), an extensive sound level survey of the Ginna Control Room was performed.

The results of the study indicated that certain alarm systems did not'fall within the guidelines of NUREG-0700, thereby, requiring system modifications.

The referenced submittal described those modifications, and others, and committed.

that work associated with Ginna Control Room alarm systems would be completed by June 30, 1988.The modifications were to change certain Control Room alarms to achieve distinguishable sound levels when compared to the annunciator alarm which was to be the reference.

The referenced letter also stated that the annunciator alarm level was not 10 dBA above background level as suggested, by the NUREG, but approximately 5 dBA above the background noise level.RG&E justified leaving the annunciator alarm at this level since it was adequately distinctive and non-irritating within its environs.All other alarms would then be set at the required.+2.5 dBA.of the annunciator, alarm level.All modifications were completed as scheduled, however, testing of the alarm systems scheduled for June 30 was cancelled because of.equipment failure.Subsequent tests of the background sound level indicated a 1 dBA increase in the level over that of the April 1987 survey (initial survey)and concurrently showed that the annunciator sound level'had decreased below the initial survey.The sound differential, therefore, was unacceptable.

8808120}30 8SOS02 PDR ADGCK 05000244 P PDC Attempts to restore the existing annunciator alarm systems to an acceptable level have been unsuccessful.

As a result, RG&E will design and install a new adjustable annunciator alarm.This alarm is presently scheduled to be installed and all alarm systems tested by the end of September 1988.If you have any concerns or questions regarding this matter, please call Charles J.Mambretti (716)724-8071.Very truly yours, Robert C.Me redy General Manager Nuclear Production xc: U.S.Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Ginna Senior Resident Inspector

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