ML20043H487

Application for Amend to License DPR-50,consisting of Tech Spec Change Request 179

ML20043H487
Person / Time
Site:	Three Mile Island
Issue date:	06/18/1990
From:	Hukill H GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20043H486	List: ML20043H485 ML20043H487 ML20043H489
References
NUDOCS 9006260009
Download: ML20043H487 (6)

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METROPOLITAN EDISON. COMPANY -

i JERSEY CENTRAL POWER & LIGHT COMPANY .t f AND '

q PENNSYLVANIA ELECTRIC COMPANY Y THREE MILE ISLAND NUCLEAR STATION, UNIT 1 te 1.

. -Y Operating License No. DPR-50 Docket No. 50-289-

~; Technical Specification Change Request No.179 1,

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l This Technical-Specification Change Request is submitted in support of Licensee's j!

request to change Appendix A to Operating License No. DPR-50 for.Three. Mile Island '-

i- Nuclear Station, Unit 1. As a part of this request, proposed replacement pages for Appendix A are also included.  ;

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i GPU NUCLEAR CORPORATION.

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, undaLN . ?yiwe By: >

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'i dh*M$$ib.. Vice PrdsYdent & Director, TMI-1 unneer,massamemarems.

Sworn and subscribed to before me this 18g 1 l day of ~1tnic , 1990.

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1 Notary Public

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9006260009 900618 PDR ADOCK 03000289

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. UNITED STATES OF AMERICA I m NUCLEAR REGULATORY COMMISSION IN THE MATTER OF~ DOCKET NO. 50-289 GPU NUCLEAR CORPORATION LICENSE NO. DPR-50 t

CERTIFICATE OF SERVICE -)

This is to certify that a-copy.of LTechnical Specification Change Request No 179 i 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 mail, addressed as follows:

i Mr. Kenneth E. Witmer, Chairman Ms. Sally S. Klein, Chairman Board of Supervisors of Board of County Commissioners '.

Londonderry Township of Dauphin County  !

25 Roslyn. Road Dauphin County Courthouse Elizabethtown, PA 17022 Harrisburg, PA 17120 i

Mr. Thomas Gerusky, Director PA. Dept.' of. Environmental Resources Bureau-of Radiation Protection .

P.O. Box 2063 Harrisburg, PA 17120 GPU NUCLEAR CORPORATION

, BY:

Vieb Pretident & Director, TM1-1

, DATE: June 18, 1990 e

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Technical Soecification Chance Recuest (TSCR) No. 179 l

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GPUN requests that the attached pages (iii, viii, 4-37, and 4-38).

replace existing pages ;iii, - viii, 4-37 and 4-38a in the TMI-1  !

Technical Specifications.

I II. pg3criotion of Technical Soecification Chances A.

(1)' Page lii, " Table of- Contents" - Technical Specification  !

4.4.4, " Hydrogen Recombiner System" was added which had been - '

previously omitted. J (2) Page viii, " List of Figures" - Figure 3.5-2m, "LOCA Limited Maximum Allowable Linear Heat Rate," was added. This figure was added.to the TMI-1 TechniM 1 Specifications _via License Amendment 152.

B. Page 4 The notation at the bottom of the page concerning the deletion of page 4-38 was removed. .

C. Page 4-38, Specification 4.4.4.1, " Hydrogen Recombiner-  ;

System":

I (1) Specification 4.4.4.1.a -

The current quarterly survsillance requirement for the hydrogen recombinet system ,

functional test' has been revised to a semiannual surveillance ~  !

frequency.

.(2) Specification 4.4.4.1.b -

The frequency of this surveillance has been revised.from every 18 months to once per refueling. interval.

(3) Technical Specification Bases 4.4.4.1 - The Bases have been revised to clarify the. safety significance' of the hydrogen recombiner system.- 1 (4) Notation was added at the bottom of the page to delete  ;

page 4-38a.  !

.~III. Reason for Chance Chanaes A. B. C.4 a These changes are for purposes of repagination and to reflect current Technical Specification figures.

Chances C.1. and C.2 Current TMI-1 Technical Specification (Tech. Spec. ) 4.4.4.1.a,

" Hydrogen Recombiner System" requires that a functional test of the hydrogen recombiner system be performed once per 92 days'to

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III. Reason for Chanae'(Cont'd.)

demonstrate that the minimum reaction chamber gas temperature is.

maintained at 2 600*F for at least.two (2) hours. Current TMI-1 1 Tech. Spec. 4.4.4.1.b.3 requires that a recombiner system functional test be performed once per 18 months to verify that j 1 the reaction chamber gas temperature is maintained 2 1200'F for 1 at leaat four (4) hours. Additionally, TMI-1 Tech. Spec.

4.4.4.1.b. requires performance of the following surveillances at ,

least once per 18 months: l

1) a channel calibration of all recombiner instrumentation and control circuits be performed;

2) a visual examination for evidence of abnormal conditions;- and i

3) a continuity and resistance to ground test of the heater electrical circuits. 1 GPU Nuclear is proposing that the quarterly functional test be revised to semiannual frequency and that the current 18 month surveillance be revised to once per' refueling interval.-This revised surveillance frequency is consistent with the safety.

significance of the system and with B&W . Standard Technical g Specifications (NUREG 0103, Revision 4).

Operation of a hydrogen recombiner at TMI-1 would not be required until e.pproximately 9.8 days following a LOCA (Reference TMI FSAR Section 6.5.3.1) . Because operation is not needed immediately,  ;

Regulatory Guide 1.7 recommends that one recombiner per site be available inr. installation, with a redundant recombiner either onsite or of fsite. ' TMI has two (2) installed, 100% capacity

. hydrogen recombiners.

Chance C.3 L This change is administrative in nature to revise the Tech. Spec.

i' Bases for the hydrogen recombiner,systec to be consistent with

the above proposed changes, i

IV. Safety Evaluation Justifyina Chancte Chances A. E. C.4

-These changes are administrative in nature; thus, no further L.

safety evaluation is necessary. <

Chances C.1 and C.2 Pursuant to Regulatory Guide 1.7, the hydrogen recombiner system- .;'

removes the hydrogen and oxygen gases that accumulate ir. the containment atmosphere following a Loss-of-Coolant Accident (LOCA) .

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( IV.- Safety Evaluation Justifyina Chance (Cont'd.)

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TMI-1 ~ FSAR Section 6. 5. 3.1 states that based on the hydrogen!

generation rate, the hydrogen recombiner will start processing  !

the containment gases when the hydrogen concentration reaches 3 ',

'w, percent of the total containment volume in order to limit'the-concentration to the lower flammability limit at 4 percent by volume. The 3 percent by volume hydrogen concentration is . 1 calculated to occur approximately 9.8 days after a LOCA.

As previously noted, TMI-1 has two (2) installed, 100%. capacity ['

hydrogen recombiners. Therefore, based on the safety significance.

of these hydrogen recombiners the. proposed revision: will not  !

decrease the effectiveness of the hydrogen recombiner system. .

1 Chance C.3 This change is administrative in nature to revise'the Bas 63 for Tech. Spac. 4.4.4 to reflect the changes proposed in this submittaT.. Thus, no further safety evaluation is necessary.

V. No Slan'.ficant Hazards Considerations K

GPU Nt' clear has determined that this TSCR poses no significant hazards as defined by the NRC in 10 CFR 50.92.

A. Operation of the facility in accordance with the proposed f amendment would not involve a significant increase in.the o L probability of . occurrence or consequences of an accident

previously evaluated. The proposed change request. revises ,

the current surveillance frequency .of 'the hydrogen '

L recombiners to be consistent with the safety significance of the system 'and the surveillence frequency in the B&W Standard Technical Specifications. The operability of the equipment is.

not affected bece.use THI-1 has two (2) installed .100%~

i. capacity hydrg en recombiners and a hydrogen recombiner is L not required to operate until. approximately 9.8 days L following a LOCA. The results of:this change will'not result .

L in any increase in the probability or consequences of events i L4 analyzed in Chapter 14 of the TMI-1 FSAR.

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[( B. Operation of the facility in accordance with the proposed-R amendment would not create the possibility of a new or  !

l different kind of accident from any accident previously evaluated. The TMI-1 FSAR states- that operability of L hydrogen recombiner is not required until approximately 9.8 L days following a LOCA. The proposed revision to the hydrogen L recombiner surveillances does not affect the possibility of L a new or different kind of accident from any accident 1 l previously evaluated. l

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V. No Sionificant Hazards Considerations (Cont'd.)

C. Operation of the' facility in accordance with the proposed amendment would not involve -a significant reduction in a margin of safety. Reasonable assurance of operability of the ,

equipment still is provided at frequencies consistent with B&W Standard Technical Specifications.

This change ~ request is typical of amendment example (vi) specified in 48 FR 14870.

VI. Imolementation It is requested that the amendment authorizing this change become effective immediately upon issuance and shall be implemented within 30 days.

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