ML19263B928
| ML19263B928 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 01/19/1979 |
| From: | Whitmer C GEORGIA POWER CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7901250150 | |
| Download: ML19263B928 (7) | |
Text
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January 19, 1979 Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
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NRC DOCKETS 50-321, 50-366 OPERATING LICENSE 5 DPR-57, NPF-5 EDWIN 1.
IIATCi! NUCLEAR PLANT UNTTS 1, 2 TECllNIC.iL SPECIFICATION:
RpS LOW VOI.TAGE TRIP Geet3emen:
Our ]ctter of January 18, 1979, requested an amendment to the Technical Specifications for Plant Hatch Units 1 and 2 for the lowering of the setpoints of the under-voltage protective instrumentation on the Reactor Protective System (RPS) Motor Generator (M/G) sets.
Georgia Power Cortpany hereby amenda that request in order to provide greater assurance of reactor safety by,the performance of increased surveillance of RPS M/G set output voltage in the case of the failure of the under-voltage trip.
The request to lower the setpoints of the under-voltage protective inctrumentation of the RPS M/G sets is withdrran.
It is noa requested that the Technical Specifications be modified to provide for increasing the frequency of surveillance of the RPS M/G set output voltage to hourly during those periods when automatic under-soltage protection cannot be adequately demonstrated per the Technical Specification sub-paragraph 4.9.D.h and 4.8.2.1.2.b for Unit 1 and 2, respectively.
Failure of the RPS M/G set under-voltage trip to meet the specifled setpoint value of greater than 108 VAC would result in the completion of the proposed action statement in the footnote to 4.9.D (4.8.2.1 for Unit 2).
The Plant Review Board and the Saf ety Revi'ew Board have reviewed and approved these proposed changes to the Unit l's and Unit 2's Technical Specifications and have determined that they do not involve an unreviewed 79012501So
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Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission January 19, 1979 Page Two safety question and that the probability of occurrence or the conse-quences of an accident or malfunction of equipment important to safety is not increased nor is the possibility of a new accident or malfunction of equipment important to safety created.
Enclosed with the proposed changes are instructions for the incorporation of the proposed revision into the Technical Specifications.
Yours very truly,
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Chas. F. Whitmer WEB /mb Enclosures Sworn to and subscribed before me this 19th day of January, 1979.
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Mr. Ruble A. Thomas George F. Trowbridge, Esquire 6
. ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.2.1.1 The above required A.C. distribution system buses and inverters shall be determined OPERABLE:
a.
At least once per 7 days by verifying correct breaker alignment and indicated power availability, and b.
At least once per 31 days by determining that the 250 volt DC/600 volt AC inverters 2R44-S002 and 2R44-S003 are OPERABLE by verify-ing inverter output voltage of 600 volts + 5% while supplying their respective buses.
- 4. 8. 2.1. 2 The above specified RPS instrumentation MG sets 2A and 2B shall be determined OPERABLE:
a.
At least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> by verifying; 1.
RPS instrumentation MG sets 2A and 2B voltage to be between 108 and 132 VAC*, and l
2.
No unexplained change in RPS instrumentation MG set 2A and/or 2B current in excess of 5% from the value observed during the Startup Test Program.
b.
At least once per 6 months and prior to resetting the Reactor Protection System trips following a seismic event of Operational Basis Earthquake intensity,. by demonstrating the OPERABILITY of RPS instrumentation MG set 2A and 2B over-voltage, under-voltage and under-frequency protective instrumentation by performance of
.a CHANNEL CALIBRATION including simulated automatic. actuation of the protective relays, tripping logic and output circuit breakers and verifying the following setpoints.
1.
Over-voltage < 132 VAC, 2.
Under-voltage > 108 VAC*, and 3.
Under-frequency > 57 Hz.
- If the under-voltage trip setpoint is less than 108 VAC, increase surveillance to once per hour and the following ACTION statement applies to LC0 3.8.2.1 and 3.8.2.2:
With RPS instrumentation M/G set lA and/or IB voltage outside the range of 108 to 132 VAC, immediately transfer the RPS instrumentation affected to the alternate source if its power is acceptable. Within one hour verify by test that each manual half scram is OPERABLE. Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, demonstrate the OPERABILITY of the Class IE loads connected to the affected bus or buses by performance of a CHANNEL FUNCTIONAL TEST.
If the M/G sets are not OPERABLE and returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, declare the affected RPS instrumentation inoperable.
HATCH - UNIT 2 3/4 8-11
LIMITiflG C0t1Dil10tl FOR OPERAilott SURVEILLAtlCElEQUTiU1LNTS
- If the under-voltage trip is less than 108 VAC increase the surveillance to once per hour and the following ACT10fl statement applies to LC0 3.9.D.
With RPS instru-mentation M/G set l A and/or IB voltage out-side the range of 108 to 132 VAC, immediately transfer the RPS instrumentation affected to the alternate source if its power is acceptable. Within one hour verify by test that each manual half scram is OPERABLE.
Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, demonstrate the OPERABILITY of the Class IE loads connected to the affected bus or buses by perfonnance of a CilAfif4EL FUtlCTIONAL TEST.
If the fi/G sets are not OPERABLE and returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, declare the affected RPS instrumentation inoperable.
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i 3.9.6b
LIMITItiGC0tiDITIONSFOROPERAT10tl SURVEILLAtlCE REQUIREMENTS 3.9.0 Reactol Protection System MG 4. 9. 'D Reactor Protection System MG Sets Sets Applicability Applicability The limiting conditions for operation apply The surveillance requirements apply to the to the reactor protection system periodic testing requirements of the instrumentation.
reactor protection system instrumentation.
Objective:
Objective:
The objective of the limiting condition The objective of the surveillance require-of operation is to assure that failure of the ments is to verify that the RPS instrumen-motor-generator set voltage regulating tation MG sets are within their normal circuitry will not result in damage to range to preclude sustained over-voltage the reactor protection system components or under-voltage conditions that might with an attendant potential loss of compromise the capability of the RPS from capability to scram the plant.
performing its intended safety function.
Specifications:
Specifications:
If in service the RPS instrumentation MG The specified RPS instrumentation MG set lA and/or 1B voltage vill be within sets lA and 1B shall be determined operable:
the range of 108 to 132 ? AC.
a.
At least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> by verifying:
1.
With RPS instrumentation MG set lA and/or 1B voltage outside the range of 1.
RPS instrumentation MG sets lA and 108 to 132 VAC, demonstrate the OPERABILITY 1B voltage to be between 108 and of all equipment which could have been 132 VAC, and subjected to the abnormal voltage for all Class IE loads connected to the 2.
No unexplained change in RPS associated bus (es) by performance of a MG set lA and/or 1B current CHANNEL FUNCTI0tlAL TEST, as requ' red, and voltage in excess of 5%
within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
from its nominal value.
2.
With RPS instrumentation MG set 1A and/or B.
At least once per 6 months and prior 1B inoperable, restore the inoperable to resttting the Reactor Protection MG set (s) to OPERABLE status within 30 System trips following a seismic minutes or remove the inoperable MG event of Operational Basis Ear +hquake
' set (s) from service.
intensity, by demonstrating the OPERABILITY of RPS instrumentation Mb set l A and IB over-voltage, under-voltage and under-frequency protective instrumentation by performance of a CHANNEL CALIBRATION including simulated automatic actuation of the protective relays, tripping logic and output circuit breakers and verifying the following setpoints:
1.
Over-voltage < 132 VAC, 2.
Under-voltage > 108* VAC, and 3.
Under-frequency > 57 Hz.
3.9.6a
ATTACHMENT 2 NRC DOCKET 50-366 OPERATING LICENSE NPF-5 EDWIN I. IIATCll NUCLEAR PLANT UNIT 2 PROPOSED CIIANCE TO TECIINICAL SPECIFICATION The proposed change to Technical Specifications (Appendix A to Operating License NPF-5) would be incorporated as follows:
Remove Page Insert Page 3/4 8-11 3/4 8-11 l
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i ATTACIIMENT 1 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 EDWIN I. IIATCll NUCLEAR PLA.VT UNIT 1 PROPOSED CIIANCE TO TECIINICAI. SPECIFICATIONS i
The proposed change to Technical Specifications (Appendix A to Operating License DPR-57) would be incorporated as follows:
Remove Page Insert Page
-3. 9. 6a 3.9.6a 3.9.6b I
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