ML20082J783
| ML20082J783 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/30/1983 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| NED-83-590, TAC-43754, TAC-43755, TAC-47143, TAC-48071, TAC-48072, TAC-48748, TAC-48749, TAC-54802, TAC-54803, NUDOCS 8312020308 | |
| Download: ML20082J783 (9) | |
Text
Georgia Power Compa y 333 Pcomont Avenue Atlanta, Georg.a 30308 Telephone 404 52G6526 Ma+ng Address-Post Othee Box 4545 Atlanta, Georgia 30302 Georgia Power L T. Gucwa tv scuhem entre astem Manager Nuclear Engineenng and Chief Nuclear Eng:neer NED-83-590 November 30, 1983 Director of Nuclear Peactor Regulation Attention: Mr. John F. Stolz, 011ef Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 NRC DOCKETS 50-321, 50-366 OPERATING LICENSES DPR-57, NPF-5 EDWIN I. HATQi NUCLEAR PLANT UNITS 1, 2 DETAILED CLARIFICATION OF REQUESTS FOR EXBIPTION FROM 10 CFR 50.48 AND 10 CFR 50 APPENDIX R Gentlemen:
Georgia Power Company's letter dated November 16, 1983, documented our clarification of certain requests for exemption from the requirements of,10 CFR 50.48 and Appendix R.
These clarifications provided additional information to address the NRC staff's concerns with the requests for exemption.
The enclosure to this letter provides replacement pages to reflect revised sections of our July 1,1982, " Response to 10 CFR 50.48 and Appe: dix R".
Should you have any questions regarding this letter or its enclosure,
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please contact this office.
Yours very truly,
/7 Q_- e _e-L. T. Gucwa RK/eb Enclosure xc: J. T. Beckham, Jr.
H. C. Nix, Jr.
J. P. O'Reilly Senior Resident Inspector T
8312020308 831130 pf
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ENCLOSURE RESPONSE TO 10 CFR 50.48 AND APPENDIX R I
REVISION INSERTION INSTRUCTIONS November 1983 Revision Status sheet (June 1983)
Discard Page 4-20 Replace Page 4-21 Replace Page 4-49 Replace Page 4-50 Replace Page 4-51 Replace l
Page 4-52 Replace Page 4-53 Replace Revision Insertion Instructions Discard 4
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Those circuits listed in paragraphs 4.1.5.3 and 4.1.6.3 as
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requiring protection will be wrapped with a 1-h barrier material.
The wrapping will provide the required protection throughout the analyzed fire area.
The wrapping will extend beyond the water curtain boundary of the fire area for a distance of 20 ft past the area boundary (column line R7).
Additionally, in the coverage area of the water curtain, all safe-shutdown related circuits will be wrapped.
The following circuits will be rerouted in the reactor building:
Component Circuit Present Location E51-F007 R24-S012-ES4-M17 130 ft north of R7 E51-F007 R24-S012-E58-C17K 130 ft and 158 ft north of R7 E51-F007 R24-S012-E58-C17J 130 ft and 158 ft north of R7 E41-F002 R24-S011-ES3-M75 130 ft south of R7 E41-F002 R24-S011-ES7-C75 130 ft south of R7 E41-F002 R24-SO11-ES7-C75A 130 ft south of R7 B21-N026A H11-P603-ESO-C047 130 ft and 158 ft north of R7 Reroute ADS from the single penetration.
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Relocate control and transfer switches for E51-F007 from panel C82-P002 to panel C82-P001 Relocate cables for E51-F007 from panel C82-P002 to panel C82-P001 4.1.5.5 Exemptions to Appendix R An exemption from the separation criteria of paragraph III.G.2 of Appendix R is requested for the fire area boundary between the north and south halves of the reactor building.
The proposed water curtain system and the proposed wrapping of both safe shutdown trains in the water curtain portion of the floors will assure that a fire in one area of the reactor building will not affect the safe shutdown equipment in the other fire area.
Further, the proposed and existing fire and smoke detection systems will provide reasonable assurance that any fire will be detected early and will be extinguished by prompt fire brigade action.
The separation exemption also extends to el 185 ft.
The i
sprinkler system on el 185 ft will assure that any fire propogating upward from the lower elevations or originating on el 185 ft will not be able to cross from one half of the reactor building to the other via the upper levels.
An exemption from the separation criteria of paragraph III.G.2 of Appendix R is requested for the substantial concrete shield 4-20 AMENDMENT 111/83
O' walls on el 130 ft and 158 ft.
These walls are at least 3 ft thick but are not presently rated due to the presence of unsealed penetrations.
The heavy walls and relatively small penetrations ensure that a fire will not propogate past these walls prior to its detection by the proposed detection systems.
Sealing these penetrations would not materially enhance fire protection safety.
An exemption from the requirement of paragraph III.G.2 of Appendix R for an area wide automatic fire suppression and detection system for the reactor building is requested.
The relatively low combustible loading in the area poses only a minimal fire hazard.
Further, the presence of electrical components and hydraulic control rod drive units that could be damaged or disabled by inadvertent actuation of a water system indicates that the installation of such a system throughout the area would degrade overall plant safety.
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4-21 AMENDMENT 111/83
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Raceway Circuit Component 2E17040 EDE311M03 2E41-F002 2E17041 EDE711C10 2E41-F002 2E17041 EDE711C11 2E41-F002 2E17042 EDE711C11 2E41-F002 1
2E26992 PUE836C09 2P41-C001B 2E26992 PUE836M02 2P41-C001B 2RDA705 EDE703C01 HPCI system 2RDA705 EDE703C02 HPCI system 2RDA706 EDE703C02 HPCI system 2RDA706 EDE703C01 HPCI system 2RDA706 BCE704CO2 ADS 2RDA706 BCE707CO2 ADS l
2E22073 RXE804C01 2R24-S018B 2E22073 RXE804M02 2R24-S018B 2E27025 RXE404M01 2R24-S018B 2E27308 BHE816C01 2B31-P003B 2MR2049 TGX307M01 2T48-F027 2MR2546 TGX311M02 2T48-F026 2RAA901 BAX902C01 2B21-NO27 2RAA902 BAX902C01 2B21-NO27 2RAB701 EDE703C03 HPCI system 2RAB702 EDE703CO3 HPCI system 2RAB703 EDE703CO3 HPCI system 2RBL804 EAE851M02 2E11-F024B 2RBL804 EAE851CO2 2E11-F024B 2RBL804 EAE851C04 2E11-F024B 2RBL805 EAE851M02 2E11-F024B 2RBL805 EAE851CO2 2E11-F024B 2RBL805 EAE851C04 2E11-F024B 2RCA701 TGX711C01 2T48-F026 2RCA701 TGX711CO2 2T48-F026 2RCA702 TGX711C01 2T48-F026 2RCA703 TGX711CO2 2T48-F026 2RDA706 EDE703CO2 HPCI system 2RDA706 EDE703C01 HPCI system 4-49 AMENDMENT 111/83
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Raceway Circuit Component 2RDA707 BCE704CO2 ADS i
2RDA707 BCE707CO2 ADS 2RDA707 EDE703C01 HPCI system 2RDA707 EDE703CO2 HPCI system i
2RDA708 BCE702COS ADS 2RDA708 BCE702C07 ADS 2RDA708 BCE704CO2 ADS 2RDA708 BCE707CO2 ADS 2RDA709 BCE702C05 ADS 2RDA709 BCE702C07 ADS 2RDA709 BCE704CO2 ADS 2RDA709 BCE707CO2 ADS 2RDA710 BCE702C05 ADS j
2RDA710 BCE702C07 ADS i
2RDA710 BCE704CO2 ADS 2RDA710 BCE707CO2 ADS 2RDA708 EDE703C01 HPCI system 2RDA708 EDE703CO2 HPCI system 4
2RDA710 EDE703C01 HPCI system 2RDA710 EDE703C02 HPCI system
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2RDA709 EDE703C01 HPCI system 2RDA709 EDE703C02 HPCI syst'em 1
2RDA901 BAX902C01 2B21-N027 2RDC701 BCE704CO2 ADS 2RDC701 BCE707CO2 ADS 2REE301 TGX307M01 2T48-F027 3
2RJA801 BHE816C01 2B33-P003B 2RLA701 BCE702C05 ADS 2RLA701 BCE702C07 ADS 2RNE701 TGX707C01 2T48-F027 2RNE701 TGX707CO2 2T48-F027 2RNE701 TGX711C01 2T48-F026 2RNE701 TGX711CO2 2T48-F026 2E27089 EEE805C14 2E51-F007 2E27089 EEE805C15 2E51-F007 2E25326 EDE616M05 2E41-F006 2E25326 EDE616MO6 2E41-F006 2E25445 EDE818COS 2E41-F008
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2E25401 EDE802C30 2E41-NO15A 4-50 AMENDMENT 111/83
(~T 4.2.6.4 Modifications
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A.
Raceways 2E26992, 2E27308, 2RBL804, 2RBL805, and 2RJ801 will be protected with a 1-h fire barrier.
Relocate instrument circuits of 2B21-N027 to pathway 2 B.
side of reactor building.
C.
Reroute HPCI Division I circuits in conduit and wrap other than the ones being rerouted by the installation of ATTS.
D.
Relocate control and power of HPCI valve 2E41-F002 to 2R24-S011A.
E.
Install a fire suppression system over panel 2082-P001B.
F.
Remove power at valve 2T48-F026 and F027.
G.
Relocate circuits EDE703C01 and EDE703C02.
H.
Protect the following raceways with a 1-h barrier:
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2E22073 2E15401 2E27025 2E27089 2E15326 2E25445 I.
Waterproof switches of panel 2C82-P001B.
J.
During the investigation of the Appendix R rule it was t
determined that the safety / relief valves (S/RVs) of the ADS system vere required for pathways 1 and 2.
In this area it was found that the circuits, controlling all of the S/RVs located in the drywell, were routed through a single penetration such that a single fire i
could affect all the S/RVs; i.e.,
the ones required for pathways 1 and 2.
This problem will be resolved when the installation of the low-low set relief valve logic is completed per the requirements of the Mark I long-term program.
This logic modification, which is being installed with the ATTS system, will separate out two S/RVs from the remaining nine, thus providing the necessary separation required by Appendix R and meeting the requirement of having separate and j
distinct active pathway components.
K.
Install a fire suppression system on the east side of l ()
el 158 ft, el 130 ft, and el 87 ft and on the west side of el 87 ft.
See paragraph 4.1.5.4 for a description of the extent of these systems.
4-51 AMENDMENT 111/83
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Deleted.
v M.
Install a partial fire detection system on el 158 ft (east side) and on el 87 ft (east and west sides).
See paragraph 4.1.5.4 for a description of the extr of these systems.
N.
h 0 above el 158 ft.
2 O.
Relocate transfer and control switches for 2E51-F007 from panel 2C82-P001B to panel 2C82-P001A.
P.
Relocate cables for 2E51-F007 from 2C82-P001B to 2C82-POOlA.
Q.
Upgrade and extend the existing missile shield around and behind panels 2C82-P001A and 2C82-P001B to provide a more effective fire resistant barrier.
Install a partition between panels 2C82-P001A and 2C82-P001B from the rear of the panels to the barrier.
R.
Install a halon system (or equivalent) with 2C82-P001A and 2C82-P001B.
S.
Install a fire detection system within 2C82-P001A and
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4.2.6.5 Exemptions to Appendix R An exemption from the separation criteria of paragraph III.G.2 of Appendix R is requested for the fire area boundary between the north and south halves of the reactor building.
The proposed water curtain system and the proposed wrapping of both safe shutdown trains in the water curtain portion of the floors will assure that a fire in one area of the reactor building will not affect the safe-shutdown equipment in the other fire area.
Further, the proposed existing fire and smoke detection system will provide reasonable assurance that any fire will be detected early and will be extinguished by prompt fire brigade action.
An exemption from the requirement of paragraph III.G.2 of Appendix R for an area wide automatic fire suppression and detection system for the reactor building is requested.
The relatively low combustible loading in the area poses only a minimal fire hazard.
Further, the presence of electrical components and hydraulic CRD units that could be damaged or disabled by inadvertent actuation of a water system indicates that the installation of such a system throughout the area would degrade overall plant safety.
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4-52 AMENDMENT 111/83
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('T An exemption is requested for the separation criteria of paragraph III.G.2 of Appendix R for the substantial concrete shield walls on 130 ft and 158 ft.
These walls are at least 3 ft thick but are not presently fire rated due to the presence of unsealed penetrations.
The heavy walls and relatively small penetration ensure that fire will not proprogate past these walls prior to its detection by the proposed detection systems.
Sealing these penetrations would not materially enhance fire protection safety.
An exemption is requested for the separation criteria of paragraph III.G.2 of Appendix R for the non-fire rated barrier between panels 2C82-POO1A and 2C82-P001B which are located adjacent to each other.
The addition of the barrier around the panels together with the fire suppression and detection systems installed within the panels as well as in the surrounding area greatly reduces the probability of a fire damaging both pathway 1 and pathway 2 components in panels 2C82-P001A and 2C82-P001B respectively.
The walls of the panels provide a degree of separation between the pathway 1 and pathway 2 components.
Therefore, the addition of a rated barrier would' not greatly enhance plant safety.
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4-53 AMENDMENT 111/83
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