ML20008G100

Forwards Application for Amend to Licenses DPR-44 & DPR-56, Changing Tech Specs Re Setpoint of Main Steam Line Tunnel Exhaust High Temp Instrumentation.Fee Encl

ML20008G100
Person / Time
Site:	Peach Bottom
Issue date:	06/29/1981
From:	Bradley E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20008G101	List: ML20008G100 ML20062L827 ML20062L830
References
NUDOCS 8107020242
Download: ML20008G100 (1)

Text

.T' PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8609 PHILADELPHIA. PA.19101

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vC pnEsioE T 1215)841 4000 AND GENERAL COUNSEL EUCENE J. BRADLEY AROCIATE GENERAL COUNGEL DONALD BLANKEN RUDCLPH A. CHILLEMI 5- Q "4",","^c%,m June 29, 1981 asTANT GEN RAL COUNSEL EDWARD J. CULLEN. JR.

JOHN F. KENNEDY. JR.

AsasTAMT COUNSEL Mt. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C. 20555 Re: Peach Bottom Atomic Power Station Units 2 and 3 Docket Nos. 50-277 and 50-278

Dear Mr. Denton:

Enclosed for filing with the Commission are three originals and 37 copies of Philadelphia Electric Company's Application for Amendment of Facility Operating Licenses DPR-44 and DPR-56. This Application requests changes to the Peach Bottom Units 2 and 3 Technical Specifications relating to the setpoint of the main steam line tunnel exhaust high

, temperature instrumentation.

1 P rsuant to Section 170.12 of the Commission's regulations, there is enclosed a check payable to the United States Nuclear Regulatory Commission in the amount of $4,400 co cover the filing fee for this Application.

Very truly yours, l

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T Eug ne ~ k.B[radley /

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Enclosures

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BEFORE THE UNITED STATES NUCLEAR REGULATORY COMMISSION In the Matter of  :

Docket Nos. 50-277 PHILADELPHIA ELECTRIC COMPANY  : 50-278 1

APPLI' CATION FOR AMENDMENT OF FACILITY OPERATING LICENSES DPR-44 & DPR-56 Edward G. Bauer, Jr.

Eugene J. Bradley 2301 Market Street Philadelphia, Pennsylvania 19101 Attorneys for Philadelphia Electric Company i

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BEFORE THE UNITED STATES. NUCLEAR REGULATORY COMMISSION In the Matter of  :

Docket Nos. 50-277 PHILADELPHIA ELECTRIC COMPANY  : 50-278 APPLICATION FOR AMENDMENT OF FACILITY OFERATING LICENSES DPR-44 & DPR-56 Philadelphia Electric Company, Licensee under Facility Operating Licenses DPR-44 and DPR-56 for Peach Bottom Units 2 and 3, hereby requests that the Technical Specifications contained in Appendix A of the Operating Licenses be amended by revising certain sections as indicated by a vertical bar in the margin of attached pages 61 and 63, and by adding page 93a.

High main steam flow instrumentation and high main steam line tunnel exhaust duct temperature instrumentation are provided to detect a breach in the main steam line. Trips are provided by these instrumentation systems to initiate isolation of the main steam system which in turn results in a reactor

scram. This amendment application involves the Technical Specification requirement that the main steam line tunnel exhaust high temperature instrumentation be set to trip at 200 degrees F.

Upon loss of the reactor building ventilation system, radiant heating in the vicinity sf the main steam lines raises the ambient ten.perature above 200 degrees F. Restoration of the main steam line tunnel ventilation flow momentarily exposes the temperature sensors to high temperature air. Experience has shown that this momentary temperature increase could cause an unnecessary main steam line isolation and reactor scram.

Licensee is proposing that the Technical Specifications be revised to permit an increase in the main steam line tunnel exhaust temperature trip setpoint to 250 degrees F for a period of up to 30 minutes to accommodate a startup of the reactor building ventilation system, thus avoiding an unnecessary plant transient. While the response time for sensing a steam leak would be increased during the temporary setpoint adjustment, the main steam line tunnel exhaust temperature detection system would retain its function of providing a trip for a 1 to 10% steam leak (original design criteria). Justification for this amendment application is based on the safety benefits of minimizing

pressure and temperature transients of plant systems, the low probability of a steam Jine leak during the temporary change in setpoint, and the ability of the temperature trio at the higher setpoint of 250 degrees F to limit the reactor coolant release to levels less than the release for the design basis steam line break.

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Since the proposed changes to the Technical Specifications involve a single safety issue, and do not involve a significant hazards consideration, pursuant to 10 CFR 170.22, Philadelphia Electric Company, for fee purposes, proposes that the Application for Amendment be considered a Class III Amendment for Unit 2 and a Class I Amendment for Unit 3.

The Plant Operation Review Committee and the Operation and Safety Review Committee have reviewed these proposed changes to the Technical-Specifications, and have concluded that they do not involve an unreviewed safety question or a significant hazard consideration; and will not endanger the health and safety of the 4

public.

ti Respectfully submitted, PHILADELPHIA ELECTRIC COMPANY By e Vice' President f(/ 1s j

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COMMONWEALTH OF PENNSYLVANIA  :

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COUNTY OF PHILADELPHIA  :

S. L. Daltroff, being first duly sworn, deposes and says:

That he is Vice President of Philadelphia Electric Company, the Applicant herein; that he has read the foregoing Application for Amendment of Facility Operating Licenses and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.

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Subscribed and sworn to beforemethisdb day of Ib (Cjl l

l t ry Public IZAB H.BOYER (

Nota ic. PNta Phila. Co.

My Commission Expires Jan.341982

CERTIFICATE OF SERVICE I certify that service of the foregoing Application was made upon the Board of Supervisors, Peach Bottom Township, York County, Pennsylvania, by mailing a copy thereof, via first-class h- mail, to Albert R. Steele, Chairman of the Board of Supervisors, R. D. No. 1, Delta, Pennsylvania 17314; upon the Board of Supervisors, Fulton. Township, Lancaster County, Pennsylvania, by mailing a copy thereof, via first-class mail, to George K.

Brinton, Chairman of the Board of Supervisors, Peach Bottom, Pennsylvania 17563; and upon the Board of Supervisors, Drumore Township, Lancaster County, Pennsylvania, by mailing a copy thereof, via first-class mail,.to Wilmer P. Bolton, Chairman of the Board of Supervisors, R. D. No. 1, Holtwood, Pennsylvania

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4 17532; all this 29th day of June, 1981.

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L Eupene J. Bradley Att rney for Philadelphia Electric Company I

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i' TABLE 3.2.A '

i INSTRUMENTATION THAT INITIATES PRIMARY CONTAINMENT ISOLATION 05' i ks -

NI"i""m No. [

($ rb j Number of Instrument O Instrument . Trip Level Setting Channels Provided i~ Ins tru:aent Action <

e Channels per By Design (2)

J Trip System (1) 2 (6) Reactor Low Water 1 0" Indicated 4 Inst. Channels A Level Level (3) l 1 Reactor High Pressure 1 75 psig 2 Inst. Channels D (Shutdown Cooling Isolation) -

2 Reactor Low-Low at or above -49" 4 Inst. C't.a.melIs A Water Level indicated level (4) l

2 (6) High Drywell Pressure 1 2 psig 4 Inst. Channels A

, m Y 2 High Radiation Main 13 X NormalRated (8) 4 Inst. Channels B j! Steam Line Tunnel Full Power Background l' 2 Low Pressure Main L 850 psig (7) 4 Inst.. Channels B

, Stean Line 2 (5) High Flow Main 1 140% cf Rated Steam Line Steam Flow ( Inst. Channels B t .

) 2 Main Steam Line 1200 deg. F (9) 4 Inst Channels B '

i Tunnel Exhaust j Duct High Temperature

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PBAPS NOTES FOR TABLE 3.2.A

1. hhanuver Primary Containment integrity is required by Section 3.7, there shall be two operable or tripped trip systems for each function.

2. If the first column cannot he met fer one of the trip systems, that trip system shall be tripped or the appropriate action listed below shall be taken.

A. Initiate an orderly shetdown and have the reactor in Cold Shutdown Condition in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

B. Initiate an orderly load

• reduction and have Main Steam Lines isolated within eight hours.

C. Isolate Reactor Water Cleanup System.

D. Isolate Shutdown. Cooling.

3. Insty. ament set point corresponds to 177.7" above top of active

. fuel.

. Inst ument set point corresponds to 129.7" above top of active fuel.

5. Two required for each steam line. ,

G. These signals also start SBGTS and initiate secondary contain-ment isolation.

7. Only ro. quired in Run Mode (interlocked with Mode Switch).

S. At a radiation level of 1.5 times the normal rated power background an alarm will be tripped 'in the control room to alert the control room operators to an increase in the main stcam line tunnel radiation icycl. g

9. In the event of a loss of ventilation in the main steam line tunnel area, the main steam line tunnel exhaust duct high temperature setpoint may be raised up to 2500F for a period not to exceed 30 minutes to permit restoration of the ventilation flow.

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PBAPS 3.2 BASES (Cont'd)

In'the-event of a loss of the reactor building ventilation system, radiant heating in the vicinity of the main steam lines raises the ambient temperature above 200 degrees F.

Restoration of the main steam line tunnel ventilation flow momentarily exposes L1e temperature sensors to high gas temperatures. The momentary temperature increase can cause an unnecessary main steam line isolation and reactor scram.

Permission is provided to increase the temperature trip setpoint to 250 degrees.F for 30 minutes during restoration of ventilation system to avoid an unnecessary plant transient.

-93a-

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