ML20199M008
| ML20199M008 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 06/27/1986 |
| From: | PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| Shared Package | |
| ML20199L985 | List: |
| References | |
| NUDOCS 8607100080 | |
| Download: ML20199M008 (7) | |
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E-BEFORE THE UNITED STATES NUCLEAR REGULATORY COMMISSION u..
In the Matter of Docket No. 50-277 50-278-PHILADELPHIA ELECTRIC COMPANY APPLICATION F R AMENDMENT OF FACILITY OPERATING LICENSES DPR-44 & DPR-56 g
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?i Edward G. Bauer, Jr.
Eugene J. Bradley 2301 Market Street Philadel_ph,ia, Pennsylvania 19101 i
Attorneys for Philadelphia Electric Company l
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8607100080 860630 DR ADOCK 05000277 i
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l BEFORE THE UNITED STATES NUCLEAR REGULATORY COMMISSION
.p, In the Matter of Docket No. 50-277 50-278 PHILADELPHIA ELECTRIC-COMPANY O
i APPLICATION FOR' AMENDMENT OF FACILITY OPERATING LICENSES DPR-44 & DPR-56 Philadelphia Electric Company, Licensee under Fagility Operating Licenses DPR-44 and DPR-56 for Peach Bottom Units 2 and 3,.respectively, hereby requests that the Technical i
a Specifications contained in Appendix A of the Operating License i
be amended as indicated by a vertical bar in the margin of 4
attached page 36a.
The proposed amendment would atid a surveillance requirement to test the time delay feature of the undervoltage protective device for the Reactor Protection System (RPS) alternate power supply.
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A time delay has been incorporated'into the design..of this protective-device to prevent unnecessary tripping of the RPS alternate power supply due to momentary voltage fluctuations on the 4 KV bus.
This time delay is needed because of voltage fluctuations experience at the Peach Bottom. Atomic Power StatTon
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when large motors are started.
Technical Specification 4.1.D.2 requires a calibration check of the trip setpoint for.the undervoltag'e device.
The time
- delay feature for this device is not identified in the Technical j
Specifications.
The NRC staff, in an April 15, 1985 telephone -
conversation regarding this matter, requested that the surveillance requirement of the Technical Specifications specify the app'ropriate testing for the time delay features.
This Amendment Application responds to that request.
Safety Analysis The alternate power source for the Reactor Protection a
System (RPS) is supplied from a 4 KV safeguard emergency bus.
ll' This. bus is fed from an auxiliary 13.2 to 4.16 KV transformer.
Both the 13.2 and 4.16 KV buses supply large motors, such as i
i Residual Heat Removal pumps, Core Spray pumps and Condensate q
pumps.
The starting current for these motors has caused emergency bus' voltage transients.
To minimize the effect of 4
these voltage transients, a four-second time delay relay is used
.i on the undervoltage isolation relay.
The delay provides l
sufficient time for the bus voltage to return to normal after a 1
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s iarge motor start and prevents. unnecessary RPS isolation or half-
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i scram signals.
i The use of the 4 second time d'elay for undervoltage i
tripping will not have any adverse effect on components.of the RPS including the scram solenoid valves.
The lowest voltage.
expected at the scram pilot valve.' solenoids during a transient is calculated to be greater than 95 volts. which is the minimum manufacturer recommended transient voltage, as compared to a normal design voltage of 115.
Since the transient voltage reduction is above the recommended minimum limit, there will be~
no degradation of the solenoid valves.
Significant Hazards Consideration Determination This Amendment Application does not reduce the requirements of the current Technical Specifications.
The proposed change constitutes an additional survelilance r'equirement not presently included in the Technical
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Specifications.
The NRC has provided guidance concerning the application of the standards for determining whether iicense amendments involve no significant hazards considerations by providing examples (48 FR 14870).
An example (ii) of an action involving no significant hazards. consideration is a change that constitutes an additional limitation, restriction, or control not presently included in the Technical Specifications.
The change proposed by 9
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this application fits this example of an action not invciving a significant hazards consideration.
(1)
The proposed change does not ir velste a significant increas.e.in the probability or consequences of an accident
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previously evaluated.because the components supplied by the
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alternate power (4KV bus) source'are designed to withstand the a
expected voltage transient during the 4-second time delay.
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i (2)
The proposed change'does not create the possibility of a new or.different kind of accident.from any previously'"
evaluated because the components supplied by the alternate pow 4r
. u (4KV bus) source are designed to withstand,t'he expected voltage transient'during the 4-second time delay.
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(3)_ The proposed change does not involve a significant 4
j reduction'in a margin of safety since it (a) reduces.the j
probability of a plant. transient, and (b)~ requires periodic
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verification of the correct setpoint value.
The Plant Operating Review Coramittee and the Nuclear Review Board have reviewed this proposed change to the Technical
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Specifica.tionsandhaveconcludedthat'it'dkesnotinvolvean unreviewed safety question or a significant hazard consideration and will not endanger. the health and safety of the publi'c.
Respectfully submitted',
Philadelphia. Electric. Company j
o A_ fetch Vice President /
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r 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 C6mpany, the Applicant herein; that he has read the foregoin'g
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Application for Amendment of Facility Operating Licenses and knows the c'ontents thereof; and that the statements and matters
' set forth therein are true end-correct to the best of his knowledge, information and belief.-
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Subscribed and sworn to F
before me this 27 day j&, /f Tb of Y
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w Notary Public MELANIE R. CAMPANELLA
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Notary Public. Philadelphia, Philadelphia Co.
. My Commission Expires February 12.1990 s
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CERTIFICATE OF SERVICE I certify that service of the foregoing Application was made upon the Commonwealth of Pennsylvania, by mailing a copy thereof, via first-class mail, to Thomas R. Gerusky, Director, Bureau of Radiological Protection, P. O. Box 2063, Harrisburg, PA 17120; all this 30th day of June, 1986.
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Euge J. Bradley Attorney for Philadelphia Electric Company G
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