ML20069J406
| ML20069J406 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 10/18/1982 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8210250136 | |
| Download: ML20069J406 (2) | |
Text
,
l GPU Nuclear r
A ps 100 Interpace Parkway w
E Parsippany New Jersey 07054 201 263-6500 TELEX 136-482 Writer's Direct Dial Numoer:
October 18, 1982 51r. Dennis bl. Crutchfield, Chief Operating Reactor Branch #5 Division of Licensing U.S. Nuclear Regulatory Com:r.ission Washington, DC 20555
Dear Sir:
SUBJECT:
Oyster Creek Nuclear Generating Station Docket No. 50-219 Reactor Protection System Power Supply
REFERENCES:
- 1. Letter D.11. Crutchfield to I. R. Finfrock, August 3, 1981
- 2. Letter P. B. Fiedler to D. Ft. Crutchfield, Starch 24, 1982
- 3. Letter P. B. Fiedler to D. 51. Crutchfield, April 29, 1982 In response to your letter of July 2,1932, please find attached the requested information.
If additional information is required, please contact 51r. J. Knubel at (201) 299-2264.
Very truly yours,
/
eter
. Fiedler Vice President and Director - Oyster Creek b1f Attachments cc:
Ronald C. Paynes, Administrator NRC Resident Inspector Region I Oyster Creek Nuc1 car Generating Station U.S. Nuclear Regulatory Conmission Forked River, NJ 08731 631 Park Avenue King of Prussia, PA 19406 8210250136 821018 PDR ADOCK 05000219 P
PDR of GPU Nuclear is a part of the General Public Utilities System j
k ATTACHMENT REACTOR PRCrECTION SYSTEM POWER SUPPLY 1)
The undervoltage, overvoltage and underfrequency setpoints for the Electrical Protection Assemblies (EPA's) shall be +10% (tolerance
+0,
-2.5%), -10% (tolerance -0, +2.5%) and 57 HZ (tolerance -0, +2.0%)
respectively; with a maxi =um time delay of 100 ms.
The setpoints are based on the voltage drop between the EPA's and the RPS conponents whose nominal voltage is 115 +2 VAC. The EPA setpoints shall be measured values rather than calculated values.
Nominal voltage is the value of voltage at the input of the EPA while delivering suf ficient cur re nt to maintain an RPS component voltage of 115
+2 VAC.
Nominal f requency shall be 60 HZ.
2)
The EPA's have been qualified for the Oyster Creek site specific seismic response spectra and will be located in the cable spread room. This location should preclude loss of component function due to natural phenomena.
Two (2) IEEE Class IE qualified EPA units are installed, in-series, in each of the two (2) RPS power buses and in the alternate bus.
Redu ndancy is provided such that if any one EPA unit in a power bus fails, the second EPA unit is totally capable of protecting the RPS and associated downstream components from overvoltage, undervoltage and underfrequency cotiitions.
Periodic functional testing shall be performed on the EPA's by removing the motor-generator set f rom the RPS distribution bus and sourcing power from the alternate feed. The alternate feed EPA's are tested while the distribution bus is sourced f rom the motor-generator set.
Indepe nde nt periodic testing may be accomplished while the reactor is in operation without af fecting redundancy.
3)
As stated in response 1 above, the setpoints are based on the voltage drop between the EPA's and the RPS components whose nominal voltage is 115 +2 VAC. The following voltage and frequency measurements will be made at the RPS components listed:
a)
Voltage and frequency at MG sets b)
Voltage at two RPS sensor relay coils c)
Voltage at two Scram relay units d)
Voltage at two Scram contactor coils e)
Voltage at two relay or contactor coils in other systems sourced by RPS MG sets
.