ML16152A688
| ML16152A688 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/21/1988 |
| From: | Pastis H Office of Nuclear Reactor Regulation |
| To: | Tucker H DUKE POWER CO. |
| References | |
| NUDOCS 8803250201 | |
| Download: ML16152A688 (5) | |
Text
March 21, 1988 Docket Nos.
50-269, 50-270 and 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company P.O. Box 33189 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Tucker:
SUBJECT:
NON-VITAL POWER SUPPLY USED IN VALVE INTERLOCK LOGIC
Reference:
Oconee Nuclear Station, Units 1, 2 and 3 We have enclosed a Westinghouse letter on "operating plant feedback-non vital power supply used in valve interlock logic". Westinghouse has sent this letter to its customers. Based on our review, this problem may affect your facility. Please review this information and determine the possible applicability to your plants Sincerely, Helen N. Pastis, Project Manager Project Directorate II-3 Division of Reactor Projects I/II
Enclosure:
As stated cc:
See next page DISTRIBUTION
,DOCKETlFILE:
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EJordan JPartlow PD i 3/DRP-I/II PD 3/PRP-I/II PD I -3/DRP-I/II MRO 4
- FEB 2 4 1988 W fnV~ i Poweram e.,,
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Mr' R E, Morgan, General o"a1r187.,sd Carolia mowe an
..Robinson, SEGP nlrt P. 0.ox~ 790 hartsville South Carolina 29550
Dear Mr. Morgan:
Carolina Power & Light Co H. B.
Robinson unit.. -...
Operating Plant Feac nek
. ole' The'purpose of this letter 1s to make YOU aware at an operating plant Which has similar design f a e ty Co antiered
- h potential Proble ivI aur** to your plant, rahe potnlow roletIvles the Capabilit,to establish POSt-LOCA r a~
I c u 1 t,
0 f l e. 1 @
~. r f o r t o t h e A t t a c h e d s k e t c h
. D r n e t i d~accidentsl a flow Path from the containment sump thog utereiga ceatn R
~~/Low a404 SafetI*
oc nmfsP through thes erha Ramor aust H* Sop e ty required.
To S tab uI, to the High Head Safety or 0 mc ti be S~ o p u p Is r q i e.T sablish this f)o pith, valves A
- p. r U u t be O p n d. H o ev er 0 V a lv es A a n d 9 a re a l s o I n t r o k d w t freauesc thas~tthose A n mrspectively
'the' interlock l09iC inlcludes a above about 200 psito Ylves cannot be Opened when the kAoM prcssure 4 a insure that valves
- 250 s&
?; The intent of this interlock lo ic is to I n s r e t h a v l v e A a n ~ B e m a n l o s e d d u r n n o r m a l W H R c o o l d o wn operation. This precludes the Possibitduro aorpressurizing the lower Foresthe oprn ag the suCtion of the HS -and Containment Spray Pumpse For the operating plant, tht Pressure transmitters Aad wrep e'dro non-vital w@!, The situation resulted In the Poeta hr vle n
non*ib8 d f* st n to ed jthe and 1I were powe ed from could blocked from opening If the nonuvital1 poentfaled -whtvalve thuA thd valves were powered from separate emergency power failedh A
th h
It is recommnded that you review the curent Iterlock logic and power arrangements for the subject valvesad nsrmtao oInuettfilr forf h ~inal er til l lows both valves to b# opened.
it is accaotable fOete sgefiure of emergenc YPower to preclude one valve from baing FROM REG.2-ATLANTA 12/04/97 13:08 P.
2 Z
No~eb~r3.
18?
1 ~FEB
- j1988 November 3o 1987
.Page 2 If remote valve operation cannot be assured, several interi, chang s could
- b. made to &)low continued plant operation,
- h; inlclude byPassing the interlock logic or manual operation of the ve,
&sn h alw.l LNoner-The Corresponding MOrgency procedure should reflect any changes.)
Longer-torm oution$ includ changing power supplies or modifying the interlock logic.
Should you have any questions. please contact me.
Sincerely, SMS*
v
- 0
. Percival. Project M anager Carolina Area Attachment
.NT/3520G-*"
4 cc:ed. E. Morgan (CP&L-MsR)
(.
m.Slone (CUL-HOR)
B. G. Rieck (CP&L-HBR)
A. f. Wallace (CP&L-MBR) 6* P. Beatty (CP&L*M8R)
S. Re Z rmn (CP&L)
- . M* Curley (CP&LeR
. Muth ( NBR)
V. E. Frazier (CP&L*M8 ).
S. Polloc W-Ralsigh)
T. CL*ments (CP&L)
NA a
calouk (CPeL)
(CP&L)
FROM REG.2-ATLANTA 12/04/67 13:08 P. 3 I*
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- -HIL.NTA 12/04/67 13:09 P. 4 T0TL P. 4
Mr. H. B. Tucker Oconee Nuclear Station Duke Power Company Units Nos. 1, 2 and 3 cc:
Mr. A. V. Carr, Esq.
Mr. Paul Guill Duke Power Company Duke Power Company P. 0. Box 33189 Post Office Box 33189 422 South Church Street 422 South Church Street Charlotte, North Carolina 28242 Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq.
Bishop, Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, N.W.
Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 525 1700 Rockville Pike Rockville, Maryland 20852 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina ?9678 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N..W.,.Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621