ML20010E685

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Provides Addl Info Requested During 810803 Telcon Re IE Bulletin 79-27, Loss of Instrumentation & Control Power. Forwards Lists of Sys Reviewed & Instrumentation Fed from Auctioneered Power Supplies
ML20010E685
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 08/31/1981
From: Colbert W
DETROIT EDISON CO.
To: Kintner L
Office of Nuclear Reactor Regulation
References
EF2-54-384, IEB-79-27, NUDOCS 8109080147
Download: ML20010E685 (7)


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s Detroit Edison Esin ~

August 31, 1981 EF2 - 58,384 Mr. L. L. Kintner a

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U. S. Nuclear Regulatory Commission g y% .s Office of Nuclear Reactor Regulation _

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Division of Licensing D T Washington, D. C. 20555 4h h+ b

Dear Mr. Kintner:

References:

Enrico Fermi Atomic Power Plant, Unit 2 NRC Docket No. 50-341

Subject:

IE Bulletin 79 Loss of Instrumer+ation and Control Power This is in response to additional information you requested in a telephone conversation on August 3, 1981.

The scope of the review has been expanded to include a total of twenty-eight systems or subsystems. These systems or subsystems encompass equipment that could be used to achieve cold shutdown. Many of Athe listed complete list systems are redundant to one another.

of the reviewed systems is shown in Appendix A. The approach to the review of these systems is as follows:

- Each system was reviewed for redundant safety functions under Division I and Division II to determine electrical independence of the instru-mentation distribution circuits to redundant devices.

- Each system was reviewed for effects of BOP loads which could possibly degrade both divisions of the Class 1E instrumentation power supplies. h00f

- This aproach, in effect, assures that any instra-mentation power supply, or bus, can be lost at Fermi 2 without jeopardizing the ability to /[

achieve cold shutdown, utilizing other instrumeu-tation that either directly performs a redundant function to the instrumentation lost, or is asso-ciated with a redundant system.

0109080147 810831 gDRADOCK 05000341 PDR

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Mr. L. L. Kintner August 31, 1981

> EF2 - 54,384' Page 2 The results of this review have confirmed our. earlier conclusions that loss of safety-related or non-safety-related instrumentation and control bus would not jeopardize the ability to safely achieve cold shutdown.

j Additional information was requested regarding-operating J

procedures. Losc of a safety or non-safety-related instrument bus is interpreted by the operator to be a

' loss of part or all of that system. This is addressed in the event-based Abnormal Operating Procedure specific to the particular component or system. In the event a safety-related instrument bus is lost, the procedure may instruct the operator to shut down, consistent with the requirements of the Technical Specifications. For loss of non-safety-related instrumentation, the procedures provide direction to the operator to re-establish system operation through the use of alternate available equip-ment or to reduce the plant load, as necessary, to com-pensate for the loss of the non-safety-related equipment. In the event the non-safety-related instru-

  • ment bus losses are compounded through multiple failures, the symptom-based Emergency Operating Procedures would be utilized to mitigate the failure and assure a safe shutdown of the reactor. In all cases, direction is provided to the operator to mitigate the effects of instrument bus losses.

Also attached, as Appendix B, is the list of instrumen-tation presently fed by a combination of AC, and AC from an inverter, together with the size of the fuse feeding 1

the inverter.

We trust that the above information, together with our previous responses, provides you with sufficient evi-dence of the adequacy of the Fermi 2 design such that this item can be closed.

Sincerely,

$f b W. F. Colbert

. Technical Director Fermi 2 Project WFC:jl Attachments cc: Mr. B. Little

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APPEDIX A SYSTES REVIEh'ED EOR IE BULLETIN 79-27 SYSTm/SUBSYSTDi NUMBER SYSTEM /SUBSYSTDi NAME Bll-06 REACIOR INSTRDENTATION B21 NUCLEAR BOILER SYSTDI B31 REACIOR RECIRCUIATING SYSTD1 Cll COtEROL ROD DRIVE HYDRAULIC COtEROL SYSTD1 C41 STANDBY LIQUID COtRROL SYSTDI C51 NEUTRCN b1EITORING SYSTDI C71 REACIOR PROFDCTICN SYSTDi Dll PROCESS RADIATION bKNITOR SYSTD1 Ell RESIDUAL HEAT RDINAL SYSTDI Ell-53 INSTRUMENTATIW - RHR SERVICE ETER SYSTD1 E21 CORE SPRAY SYSTDi E41 HIGH PRESSURE COOIA!E INJECTION SYSTDi~

E51 REACTOR CORE ISOIATION COOLING SYSTEM Gil RAIXGSTE SYSTD1 G33 REACIOR WATER CLEAN-UP SYSTD1 G51 'IORUS ETER MANAGDDR SYSTD1 ..

P34 POST-AOCIDENT MCNITORItG SYSTDI P44 DERGENCY EQUIPMENT COOLING ETER P45 DERGENCY EQUIPMENT SERVICE ETER SYSTDi P50 CCNPRESSED AIR SYSTD1S R30 STANDBY DERGENCY POWER SYSTRI T23 CGTAINMENT SYSTDi T41 HEATING, VD'TIIATING, AND AIR CWDITIONING SYSTD1 T46 STANDBY GAS TRENDER SYSTEM j T47 CONTAINMENT A'IMOSPHERE COOLING SYSTDI T48 CCNTAINbHE AINOSPHERE COtRROL SYSTENS T50 PRIMARY CGTAINMENT ATMOSPEERE MONITORING SYSTEM

)

APPENDIX B INSTRUMENTATIW FED FIm AUCTIQ4EERED POWER SUPPLIES (A.C. AND D.C. 'IEROUGI AN INVERTER)

Four such supplies exist, labeled H21-P080, H21-P081, H21-P082, and H21-P083. Each inverter is protected with a 15-ampere fuse on the D.C. source. The list of instru-mentation fed by these inverter /A.C. cource combination is as follows:

XMTR. NO. TRIP UNIT NO. T/U RACK NO. EUNCTICN B21-N085A B21-N685A H21-P080 EUEL ZWE WATER LEVEL B21-N085B B21-N685B H21-P081 FUEL ZONE WATER LEVEL B21-N090A B21-N690A H21-P082 RPV PRESSURE B21-N090B B21-N690B H21-P083 RW PRESSURE B21-N090C B21-N690C H21-P080 RPV PRESSURE B21-N090D B21-N690D H21-P081 PRV PRESSURE B21-N091A B21-N691A H21-P082 RPV WIDE RANGE WATER LEVEL B21-N091A B21-N692A H21-P082 RPV WIDE RANGE h%TER LEVEL B21-N091A B21-N693A H21-P082 RPV WIDE RANGE WATER LEVEL B21-N091B B21-N691B H21-P083 RPV WIDE RATE WATER LEVEL B21-N091B B21-N692B H21-P083 RPV WIDE RANCE WATER LEVEL B21-N091B B21-N693B H21-P083 RPV WIDE RANGE WATER LEVEL B21-N091C B21-N691C H21-P082 RPV WIDE RANGE WATER LEVEL B21-N091C B21-N692C H21-P082 RPV WIDE rat E WATER LEVEL B21-N091C B21-N693C H21-P082 RPV WIDE RANGE WATER LEVEL E21-N091D B21-N691D H21-P083 RPV WIDE RANGE WATER LEVEL t

B21-N091D B21-N692D H21-P083 RPV WIDE RANGE WATER LEVEL B21-N091D B21-N693D 321-P083 RPV WIDE RANGE WATER LEVEL B21-N094A B21-N694A H21-P082 DRYWELL PPESSURE B21-N094B B21-N694B H21-P083 LRWELL PRESSURE B21-N094C B21-N694C H21-P082 DRYWELL PRESSURE B21-N094D B21-N694D H21-P083 DRYWELL PRESSURE B21-N094E B21-N694E H21-P082 DRYWELL PRESSURE B21-N094F B21-N694F H21-P083 DRYWELL PRESSURE

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APPDJDIX B (cont'd.)

i PffR. NO. TRIP UNIT NO. T/U RhCK NO. IUNCTION B21-N094G B21-N694G H21-P082 DRYWELL PRESSURE B21-N094H B21-N694H H21-P083 DRYWELL PRESSURE B21-N095A B21-N695A H21-P082 RPV NARROW RANGE WATER LEVEL B21-N095B B21-N695B H21-P083 RPV NARROW RANGE WATER LEVEL B21-N110A B21-N610A H21-P082 RPV PRESSURE B21-N110B B21-N610B H21-P083 RPV PRESSURE B21-N110C B21-N610C H21-P082 RPV PRESSURE B21-N110D B21-N610D H21-P083 RPV PRESSURE B21-NlllA B21-N611A H21-P082 RPV PRESSURE i B21-NillB B21-N611B H21-P083 RPV PRESSURE B21-N111C B21-N611C H21-P082 RPV PRESSURE B21-NlllD B21-N611D H21-P083 RPV PRESSURE ,

B31-N110A B31-N610A H21-P080 RECIPCULATING LINE RISER AP B31-N110B B31-N610B H21-P081 PJDCIRCUIATING LINE RISER AP B31-N110C B31-N610C H21-P080 RECIRCUIATING LINE RISER oP

B31-N110D B31-N610D H21-P081 RECIRCUIATING LINE RISER dP B31-NlllA B31-N611A H21-P080 RECIRCUIATING LINE B SUCTION PRESSURE B31-NlllB B31-N611B H21-P081 RECIRCUIATING.LINE B SUCTION PRESSURE B31-Nil 2A B31-N612A H21-P080 RECIRCUIATING PUMP 6 P B31-N112B B31-N612B H21-P081 RECIRCUIATING PUE AP B31-Nil 3A B31-N613A H21-P080 RECIRCUIATING PUMP AP B31-N113B B31-N613B H21-P081 RECIRCUIATING PUMP dP B31-Nil 4A B31-N614A H21-P081 RECIRCUIATING PUMP AP B31-Nil 4B B31-N614B H21-P080 RECIRCUIATING PUMP 6P B31-N115A B31-N615A H21-P081 RECIRCUIATING PUMP AP B31-Nil 5B B31-N615B H21-P080 RECIRCUIATING PUMP 6P Ell-NOSSA Ell-N655A H21-P080 RHR PUMP DISCHARGE PRESSURE Ell-N055B Ell-N655B H21-P081 RHR PUMP DISCHARGE PRESSURE Ell-N055C Ell-N655C H21-P080 1<HR PUMP DISCHARGE PRESSURE Ell-N055D Ell-N655D H21-P081 RHR PUMP DISCHARGE PRESSURE Ell-N056A Ell-N656A' H21-P080 RHR PUMP DISCHARGE PRESSURE t

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APPENDIX B (cont'd.)

XMPR. NO. TRIP UNIT NO. T/O RN'd NO. FUNCTIOJ Ell-N056B Ell-N656B H21-P081 RHR PUMP DISCIARGE PRESSURE Ell-NG56C Ell-N656C II21-P080 RHR PUMP DISQlARGE PRESSURE Ell-N056D Ell-N656D H21-P081 RHR PUMP DIS 01AI4A PRESSURE E21-N055A E21-N655A H21-P080 CORE SPRAY PUMP DISCIARGE PRESSURE E21-N055B E21-N655B II21-P081 CORE SPRAY PUMP DISOIARGE PRESSURE E21-N062A E21-N662A H21-P080 COPE SPRAY PUMP DIS 01ARGE PRESSURE E21-N062B E21-N662B H21-P081 CORE SPRAY PUMP DISOIARGE PRESSURE E41-N055A E41-N655A H21 "080 HPCI TURBINE EXHAUST DIAPHRTG1 PRESSURE E41-N055B E41-N655B H21-P081 HECI TURBINE EXHAUST. DIAPERAG1 PRESSURE E41-N055C E41-N655C H21-P080 HPCI TURBINE EXHAUST DIAPHRAG1 PRESSURE E41-N055D E41-N655D H21-P081 HPCI TURBINE EXIIAUST DIAPHRAGM PRESSURE 241-N057A E41-N657A H21-P080 HPCI STFR1 4 P E41-N057A E41-N660A H21-P080 HPCI STF#1 AP E41-N057B E41-N657B H21-P081 HPCI STEAM AP E41-N057B E41-N660B H21-P081 HICI STFR1 AP E41-N058A E41-N658A H21-P080 HPCI STFR1 PRESSURE E41-N058B E41-N658B H21-P081 HICI STFR1 PRESSURE E41-N058C E41-N658C H21-P080 HPCI STEAM PRESSURE E41-N058D E41-N658D  ?!21-P081 HPCI STFR1 PRESSURE E41-N061B E41-N661B H21-P081 CCNDENSATE STORAGE TANK IEE, E41-N061D E41-N661D H21-P081 CQJDENSATE STORAGE TANK LEVEL E41-N062B E41-N662B H21-P081 SUPPLEMENTAL POOL LEVEL E41-N062D E41-N662D H21-P081 SUPPID1 ENTAL POOL LEVEL E51-N055A E51-N655A H21-P080 RCIC TURBINE EXHAUST DIAPH. PRESSURE E51-N055B E51-N655B H21-P081 ICIC TURBINE EXHAUST DIAPH. PRESSURE E51-N055C E51-N655C H21-P080 BCIC TURBINE EXHAUST DIAPH. PRESSURE E51-N055D E51-N655D H21-P081 BCIC TURBINE EXHAUST DIAPH. PRESSURE E51-N057A E51-N657A H21-P080 RCIC STEAM AP E51-N057A E51-N660A H21-P080 BCIC STF#1 AP E51-N057B E51-N657B H21-P081 RCIC STFAM AP APPENDIX B (cont'd.)

DDR. NO. TRIP UNIT NO. T/U RACK NO. EUNCTION E51-N057B E51-N660B H21-P081 BCIC STEAM AP E51-N058A E51-N658A H21-P080 BCIC STEAM PRESSURE E51-N058B E51-N658B H21-P081 BCIC STEAM PRESSURE E51-N058C E51-N658C H21-P080- RCIC STEAM PRESSURE E51-N058D E51-N658D H21-P081 BCIC STEAM PRESSURE

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