ML20108B722
| ML20108B722 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/29/1984 |
| From: | Dixon O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| SPR-84-014, SPR-84-14, NUDOCS 8411160155 | |
| Download: ML20108B722 (2) | |
Text
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1 PRP 0FFICIAL COPS g
i' SOUTH CAROLINA ELECTRIC & GAS COMPANY POST OFFICE 764 OOLUMelA. Sout CAROLINA 29218 mu.1 4*
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N October 29, 1984 Mr. James P. O' Reilly Regional Administrator U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, NW Atlanta, GA 30323
SUBJECT:
Virgil C.
Summer clear Station Docket No. 50/395
/f Operating Licens No. NPF-12 Special Report (SPR 84-014)
Dear Sir:
Attached is a Special Report for the Virgil C. Summer Nuclear Station.
This Report is required by Technical Specification 6.9.2 as a result of I
entry into Action Statement (a) of Technical Specification 3.4.9.3,
" Overpressure Protection Systems," on September 30, 1984.
Should there be any questions, please call us at your convenience.
Very truly your i
M-i O. W.
D xon, Jr.
CJM:OWD/ led Attachment cc:
V. C.
Summer K.
E.
Nodland T.
C.
Nichols, Jr./O. W.
Dixon, Jr.
R. A.
Stough E.
H. Crews, Jr.
G.
Percival E.
C. Roberts C.
W.
Hehl W. A. Williams, Jr.
J. B.
Knotts, Jr.
D. A.
Nauman IKE Washington Group Managers Document Management Branch O. S. Bradham INPO Records Center C.
A.
Price ANI Library l
D. A.
Lavigne NPCF J.
F. Heilman File C.
L. Ligon (NSRC) l 8411160155 841029 DR ADOCK 05000395 OhitetAL copy h
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Mr. James P.
O' Re illy SPR 84-014 October 29, 1984 CAUSE OF INOPERABILITY On September 30, 1984, the Plant was in the process of cooling down for entry into Mode V for the First Refueling Outage.
When the Reactor Coolant System (RCS) temperature reached 300*F, Technical Specification 3.4.9.3, " Overpressure Protection Systems," required either:
a) two (2) operable Power Operated Relief Valves (PORVs), or b) the RCS depressurized with a vent of greater than or equal to 2.7 rTuare inches.
The operability of the two PORVs ensures that the RCS will be protected from pressure transients which would exceed the limits of Appendix G to 10CFR50.
The Licensee was unable to meet the above requirement for two (2) operable PORVs because PORV PCV-445A had previously been declared inoperable and blocked because of a design error.
The details of this design error are addressed in LER 83-100, Revision 1, dated January 27, 1984.
PLANS FOR RESTORING TO OPERABLE STATUS South Carolina Electric and Gas Company has received an amendment to Technical Specification 3.4.9.3 allowing the use of.the Residual Heat Removal System (RHRS) relief valves as the primary method of mitigating cold overpressurization transients.
The hardware modifications for the transition from PORVs to RHRS relief valves for Cold Overpressure Protection System (COPS) will be completed during the present refueling outage enabling compliance with revised Technical Specification 3.4.9.3.
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