h office of nuclear beactor regulation 47/ w kgb' · 9 > nn v/ 4 g south carolina electric...

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, > 9 nn / 4 g V SOUTH CAROLINA ELECTRIC a gas COMPAND g p N ..mm..... _ g ,;) g CotuMeA, south CARouM A 192t8 ' NOV2 01981* Je{l ' T. C. NICHOLS, JR. November 16, 1981 %c Pacum, a.o Geove [arcutwc '* j ppgg m e.* w ortwas (- pgs gow h /\ 47/ W kgb' M: . Harold R. Denton, Director Office of Nuclear Beactor Regulation U. S. Nuclear Regulatory Ccmnission Washington, D. C. 20555 Subject: Virgil C. Summer Nuclear Station Docket No. 50/395 Emergency Feedwater Systen Modifications SER Item 1.7.12 Dear Mr. Denton: In our letter dated Novmeber 3, 1981, South Carolina Electric and Gas Cmpany (SCE&G) provided information regarding SER Confirmatory Issue 1.7.12. mis letter provides corrections and clarification to several items in that letter. A. Emergency Femiwater System 1. %e design for the rxxiification to the emergency feedwater , control valves has been cmpleted ard the prts have been ordered. We anticipate this modification will be cxxnpleted in the plant prior to fuel load. 2. We design for the pressure test paint has been empleted and the construction drawings have ben reviset his mcdification will be empleted in the plant prior to fuel load. 3. So design for the energency feedwater high flow alarm has , been completed. This modification will be ecmpleted in the plant prior to fuel load. 4. We design to modify the control circuits for the energency festeater control valves to permit reset of the irdividual valves after a high flow isolation signal is arnplete and the required prts have been orderal. We anticipate the o g/ mcxiification will be arnpleted in the plant prior to fuel D load. S 5. mis is being implemented as a part of item 1 abne. / / 6. No change. , 7. %e design to modify the controls for the merJency feedwater ptznp stean supply valve has b2en cmpleted. Additionally, the design to add th air accumulator for valve IW 2030-MS has been completed. These modifications will be empleted in the plant prior to fuel load. 8111230325 811116 PDR ADOCK 05000395 E PDR J .-

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Page 1: h Office of Nuclear Beactor Regulation 47/ W kgb' · 9 > nn V/ 4 g SOUTH CAROLINA ELECTRIC a gas COMPAND g p N..mm..... _ g,;) g CotuMeA, south CARouM A 192t8 ' NOV2 01981* Je{l T

,

>9

nn/ 4 gV

SOUTH CAROLINA ELECTRIC a gas COMPAND g p N

..mm....._ g ,;) g

CotuMeA, south CARouM A 192t8'

NOV2 01981* Je{l'

T. C. NICHOLS, JR. November 16, 1981%c Pacum, a.o Geove [arcutwc '*j ppgg

m e.* w ortwas (- pgs gow

h/\

47/ W kgb'M: . Harold R. Denton, DirectorOffice of Nuclear Beactor RegulationU. S. Nuclear Regulatory CcmnissionWashington, D. C. 20555

Subject: Virgil C. Summer Nuclear StationDocket No. 50/395Emergency Feedwater Systen ModificationsSER Item 1.7.12

Dear Mr. Denton:

In our letter dated Novmeber 3, 1981, South Carolina Electric andGas Cmpany (SCE&G) provided information regarding SER ConfirmatoryIssue 1.7.12. mis letter provides corrections and clarification toseveral items in that letter.

A. Emergency Femiwater System

1. %e design for the rxxiification to the emergency feedwater,

control valves has been cmpleted ard the prts have beenordered. We anticipate this modification will be cxxnpletedin the plant prior to fuel load.

2. We design for the pressure test paint has been empletedand the construction drawings have ben reviset hismcdification will be empleted in the plant prior to fuelload.

3. So design for the energency feedwater high flow alarm has,

been completed. This modification will be ecmpleted in theplant prior to fuel load.

4. We design to modify the control circuits for the energencyfesteater control valves to permit reset of the irdividualvalves after a high flow isolation signal is arnplete and therequired prts have been orderal. We anticipate the o g/mcxiification will be arnpleted in the plant prior to fuel Dload. S

5. mis is being implemented as a part of item 1 abne. / /

6. No change.,

7. %e design to modify the controls for the merJencyfeedwater ptznp stean supply valve has b2en cmpleted.Additionally, the design to add th air accumulator for valveIW 2030-MS has been completed. These modifications will beempleted in the plant prior to fuel load.

8111230325 811116PDR ADOCK 05000395E PDR J.-

Page 2: h Office of Nuclear Beactor Regulation 47/ W kgb' · 9 > nn V/ 4 g SOUTH CAROLINA ELECTRIC a gas COMPAND g p N..mm..... _ g,;) g CotuMeA, south CARouM A 192t8 ' NOV2 01981* Je{l T

*w

Mr. Harold R. DentonNovember 16, 1981Page 2

8. No diange.

B. Steam Generator Atnostheric Relief Valves

his modification will be cmpleted in the plant prior tofull pwer operation. Additionally, revised electricalelementaries B-208-067 MS20A, 21A, and 22A have been provided asenclosures 1, 2, and 3 to correctly indicate an energize to blocksteam dump function.

Electrical elementary diagram B-208-032-EF50 has also beenprovided as enclosure 4 to show the emergency feedwater high flowalarms. Bis was inadvertantly mitted in the 1bvember 3,1981,letter.

De SCE&G cenitment to omplete the above modifications isdependent upon material availability where noted above. If

delivery poblems develop, we will advise you.

If any questions advise, please let us know.

Very truly yours,/

/A f Y /,. .

T. C. Nichols, Jr.

RBC:'ICN:lkbcc: V. C. Summer

G. H. FischerT. C. Nichols, Jr.

H. N. CyrusJ. C. RuoffD. A. NaumanW. A. Williams, Jr.R. B. ClaryO. S. BradhamA. R. KoonM. N. BrowneB. A. BurseyJ. L. SkoldsJ. B. Knotts, Jr.H. E. YoccmH. T. BabbNPCF -

'

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Page 5: h Office of Nuclear Beactor Regulation 47/ W kgb' · 9 > nn V/ 4 g SOUTH CAROLINA ELECTRIC a gas COMPAND g p N..mm..... _ g,;) g CotuMeA, south CARouM A 192t8 ' NOV2 01981* Je{l T

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