ML20212B068
| ML20212B068 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/24/1987 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20212B018 | List: |
| References | |
| NUDOCS 8703030470 | |
| Download: ML20212B068 (4) | |
Text
m METROPOLITAN EDISON C(NPANY JERSEY CENTRAL POWER & LIGHT COMPANY AND PENNSYLVANIA ELECTRIC COMPANY THREE MILE ISLAND NUCLEAR STATION, UNIT 1 Operating License No. DPR-50 Docket No. 50-289 Technical Specification Change Request No.158 This Technical Specification Change Request is submitted in support of Licensee's request to change Appendix A to Operating License No. DPR-50 for Three Mile Island Nuclear Station, Unit 1.
As a part of this request, proposed replacement pages for Appendix A are also included.
GPU NUCLEAR CORPORATION BY:
Vice President & Director, TMI-1 i
Sworn and Subscribed to before me this Jdh day of,/fJpnmL,1987.
4 Mi_#)L [ I1ML%
l Notary Public SHARON P. BROWN, NOTARY Pultic LiDDLETOWN BORD. DAUPH!N C00177 blY C0HIS$10N [1PICf 3 JUN! 12,1989 Wember, Peansyinais Asoccestics of Notaries t
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION IN THE MATTER OF DOCKET NO. 50-289 LICENSE N0. DPR-50 GPU NUCLEAR CORPORATION This is to certify that a copy of Technical Specification Change Request No.158 to Appendix A of the Operating License for Three Mile Island Nuclear Station Unit 1, has, on the date given below, been filed with executives of Londonderry Township, Dauphin County, Pennsylvania; Dauphin County, Pennsylvania; and the Pennsylvania Department of Environmental Resources, Bureau of Radiation Protection, by deposit in the United States nail, addressed as follows:
Mr. Jay H. Kopp, Chairman Mr. Frederick S. Rice, Chairman Board of Supervisors of Board of County Commissioners Londonderry Township of Dauphin County R. D. #1, Geyers Church Road Dauphin County Courthouse Middletown, PA 17057 Harrisburg, PA 17120 Mr. Thones Gerusky, Director PA. Dept. of Environmental Resources Bureau of Radiation Protection P.O. Box 2063 Harrisburg, PA 17120 GPU NUCLEAR CORPORATION BY:
V1cb Presfdent & Director, TMI-l DATE:
February 24. 1987
I.
TECHNICAL SPECIFICATION CHANGE REQUEST (TSCR) NO. 158 GPUN requests that the following pages be inserted into the existing Technical Specifications:
new page 3-40f and revised pages 11 and 4-7a These pages are attached to this change requesi.
II.
REASON FOR CHANGE 4
As a result of GPUN commitment to comply with NUREG-0737 Item III. D.3.4.
III. SAFETY EVALUATION JUSTIFYING CHANGE The Chlorine Detection System is provided to alarm and isolate the control room in the event of an onsite chlorine gas release. This Chlorine Detection System (CDS) is designed to provide alarm in the 4
control room upon detection of a chlorine release to allow operators 2 minutes to don emergency breathing apparatus and to provide interlocks to initiate isolation of the Control Building Ventilation System (CBVS) within ten (10) seconds af ter detection of a five (5) PPM concentration of chlorine at the detector location.
The CDS consists of two independent instrumentation channels with redundant detectors located at both the River Water Pump House Chlorinator House and the Air Intake Structure. The CDS is designed to provide interlocks with the CBYS for isolation and signals for control i
room alarms. The CD3 is provided with redundant Class 1E electrical power supplies. The interlocks and alarms are redundant and are designed so that the-failure of one instrumentation channel would not prevent the CDS from performing its safety function.
The CDS is desi volume (45mg/m@gned so that the human toxicity limits of 15 PPM by) is not exc l
minutes after the operators are made aware 'of the presence of chlorine.
The control room operators are alerted of a chlorine release at any remote detector which allows them two (2) minutes to don emergency breathing apparatus. A chlorine concentration of 5 PPM at any remote detector initiates isolation of the CBVS within ten (10) seconds.
The CDS is operable during all nodes of plant operation. The existing emergency mode of operation for the CBVS is not changed by the addition of the CDS.
The only change is that the Control Building Hallway Fans are operable for purging the air intake tunnel prior to returning the CBVS to normal operation. The CDS is periodically tested and inspected as specified in proposed Technical Specification Table 4.1-1.
IV.
NO SIGNIFICANT HAZARDS CONSIDERATIONS GPUN has determined that this Technical Specification Change Request poses no significant hazards as defined by NRC in 10 CFR 50.92.
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IV. NO SIGNIFICANT HAZARDS CONSIDERATIONS (CONT'D.)
1.
Operation of the facility in accordance with the proposed amendment would not irwolve a significant increase in the probability of occurrence or consequences of an accident previously evaluated.
The design basis event related to this change is an accidental release of chlorine. The proposed amendment has no effect on the probability of occurrence of this design basis event. The potential consequences of an accidental release of chlorine are reduced because the proposed change provides additional assurance that the CDS is operable and therefore capable of pronptly detecting the chlorine release and initiating isolation of the control building ventilation system.
2.
Operation of the facility in accordance with the proposed anendment would not create the possibility of a new or different kind of accident from any accident previously evaluated. The design basis event related to this change is an accidental release of chlorine.
The proposed amendment has no effect on the possibility of creating a new or different kind of accident from any accident previously evaluated.
The proposed amendment provides additional assurance that the CDS is maintained within the limits determined by the existing safety analyses and is unrelated to the possibility of creating a new or different kind of accident.
3.
Operation of the facility in accordance with the proposed amendment would not involve a significant reduction in a margin of safety. The proposed criteria, which complies with Regulatory Guide 1.95, Revision 1, constitutes an additional control not presently included in the technical specifications. Therefore the overall nergin of safety for the plant is increased.
The Commission has provided guidelines pertaining to the application of the three standards by listing specific exanples in 48FR 14870. The proposed amendment is considered to be in the same category as example (ii) of amendments that.are considered not likely to involve significant hazards consideration in that the proposed change constitutes an additional control not presently included in the technical specifications. Thus, operation of the facility in accordance with the proposed amendment involves no significant hazards considerations.
V.
IMPLEMENTATION It is requested that the amendment authorizing this change become effective upon issuance.
VI. AMENDMENT FEE (10 CFR 170.21)
Pursuant to the provisions of 10 CFR 170.21, attached is a check for
$150.00.
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