ML17254A834
| ML17254A834 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 06/21/1984 |
| From: | Kober R ROCHESTER GAS & ELECTRIC CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8406260155 | |
| Download: ML17254A834 (6) | |
Text
b REGULATORl FORMATION DISTRIBUTION S'M (RIDS)
II ACCESSION NBR: 8406260155 DOC, DATE: 84/06/21 NOTARIZED:,NO,.
DOCKET FACIL;50 244'obert Emmet Ginna Nuclear Plant< Unit 1~ Rochester G
05000244 AUTH ~ NAME 'UTHOR AFFILIATION, KOBERiR,l'(.
Rochester Gas 8 Electric Corp.
REC IP ~ NAME RECIPIENT AFFILIATI QN CRUTCHFIELDg D, Operating Reactors Branch 5
SUBJECT:
Submits addi infoi supporting 831110 proposed Tech Spec permitting use of technjcla support ctr'attery in place 'of Class, IE battery.Intertie statusisys operability 8 battery monitoring provided.
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ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.K 14649-0001 ROGER W. KOBER VICE PRESIDENT ELECTRIC & STEAM PRODUCTION TELEPHONE AREA CODE 7 IS 546-2700 June 21, 1984 Director of Nuclear Reactor Regulation Attention:
Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch No.
5 U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Proposed Technical Specification Change R.
E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Mr. Crutchfield:
In an application dated November 10, 1983 we proposed a
Technical Specification which would permit use of the Technical Support Center (TSC) battery in place of a Class 1E battery for a limited period of time.
The following information is provided in response to NRC Staff questions regarding this proposal.
1)
Intertie status:
The intertie between the Class lE batteries, the "A" and "B"
batteries, (circuit E13) will be removed prior to the use of the Vital Battery TSC battery intertie.
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tA NILII In addition, the charger tie switch to either train from the 75 amp chargers 1A1 and 1Bl, will be removed after new battery chargers with greater capacity are installed.
This is part of the battery/charger replacement project presently planned for the 1985 and 1986 refueling outages.
The additional charger has been used after discharge tests when charging current demand is very high.
Replacement chargers will have a higher capacity such that this intertie will not be necessary.
2)
System Operability:
This system would be used whenever an existing vital battery is not operable due to testing, maintenance, battery replace-ment, battery failure, or other event which incapacitates the lE battery.
Procedures have been developed at Ginna to perform this intertie.
The procedures are currently being modified such that the TSC battery voltage will be checked prior to connection to a vital DC load group.
The required test voltage will verify battery capacity to be at 100 percent in accordance with published capacity curves for the specific cell type.
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ROCHESTER GAS AND ELECTRIC CORP.
oATE June 21, 1984 Mr. Dennis M. Crutchfield SHEET NO.
2 Regularly scheduled periodic surveillance was not proposed as part of the Technical Specifications since credit will not normally be taken for the TSC battery, since the required capacity would be verified prior to the intertie being used, and since credit can only be taken for a short period of time.
The TSC battery system will, however, be tested periodically as part of a normal good practice.
Monthly, the specific gravity of selected cells will be tested.
Quarterly, the specific gravity of all cells will be tested.
3)
Battery Monitoring:
The A 6 B batteries are monitored for battery voltage, amps charging and discharging, and zero amp flow which would be indicative of an open battery condition.
The battery current is displayed in the control room and the battery voltage may be read in the control room using existing meters.
There is annunciation in the control room for low and high voltage, zero amps charging, battery discharge, and battery charger failure.
The TSC battery is monitored in the control room for current flow to the vital DC system when the TSC battery is tied to either A or B train.
The voltage may be read in the control room when the intertie condition exists.
There is annuncia-tion in the control room for the TSC battery charger failure.
r truly yours, R
er W. Kober
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