ML20141G613
| ML20141G613 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 04/18/1986 |
| From: | Zwolinski J Office of Nuclear Reactor Regulation |
| To: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| References | |
| TAC-59830, NUDOCS 8604230462 | |
| Download: ML20141G613 (4) | |
Text
km a**g'o UNITED STATES
[
j NUCLEAR REGULATORY COMMISSION g
j wasamoron, o. c. nossa April 18,1986
+
Docket No. 50 '14 Mr. P. B. Fiedler Vice President and Director Oyster Creek Nuclear Generating Station Post Office Box 388 Forked River, New Jersey 08731
Dear Mr. Fiedler:
SUBJECT:
CANCELLATION OF PRLPOSED MODIFICATION TO INSTALL A PRESSURE RELIEF VENT IN THE SGTS DUCTWORK (TAC 59830)
Re:
Oyster Creek Nuclear Generating Station By letter dated September 24, 1985, you proposed to cancel your commitment to install a pressure relief vent in the Standby Gas Treatment System (SGTS) exhaust duct from the drywell.
Your commitment to install this vent during the Cycle 11 Refueling (Cycle 11R) outage was made in your letter to the staff dated May 14, 1984, as part of the staff's review of Multi-Plant Action (MPA) R-24, Containment Purging During Normal Plant Operation. The staff's letter to you on MPA B-24 and this commitment is j
dated January 21, 1986.
On page 6 of our letter of January 21, 1986, we stated that you had bean requested as part of MPA B-24 to submit an analysis which demonstrates the I
acceptability of the provisions made to protect safety-related structures and equipment located beyond the purge / vent isolation valves against loss of function from the environment created by the escaping air and steam i
during a loss-of-coolant accident (LOCA). The only safety-related eautoment located downstream of the purae/ vent isolation valves at Oyster Creek are the SGTS trains. To protect the SGTS and the associated ductwork from the pressure rise that would occur before the purge valves are fully closed, you j
proposed by letter dated May 14, 1984 to modify the purge / vent exhaust system i
l by installing (1) a relief vent in the ducting just beyond the purge system I
outboard isolation valves and (2) a time delay to start opening the SGTS filter inlet valve after 5 seconds.
In the letter May 14, 1984, the 5-second delay was to protect the SGTS and the relief vent 'tas to protect l
the ductwork and the SGTS filter units; however, in the meeting sunnary l
dated April 12, 1986, it was stated that the 5-second delay was actually to protect the SGTS and its filters and the relief vent was only to protect the ductwork. You stated in your letter dated September 24, 1985, that the 5-second time delay has been installed.
l In your letter dated Soptember 24, 1985, you now state that this commitment for installing the pressure relief vent has been reevaluated.
You state that the calculations now show that following a LOCA there will j
be no rupture of the SGTS ductwork from the pressure rise follnwing the l
LQCA and, therefore, have concluded that there is no need for any modification to the ductwork system.
8604230462 860418 l
PDR ADOCK 05000219 L
P PDR
s Mr. P. B. Fiedler April 18,1986 Rased on our resiew of your comitment discussed above durina the staff's review of MPA B-24, we conclude that this comitment was not required by the staff as a result of a staff review of this ductwork. The comitment came from your review of the pressure conditions in the SGTS ductwork following a LOCA. Therefore, based on your reevaluation as discussed above, we conclude that you do not need to install the pressure relief vent in the uDcoming Cycle 11R outace.
[I [f Sincerely
\\,
s John A. Zwolinski, Director PWR oject Directorate #1 Division of BWR Licensino cc:
See next pace
.=. -. _ _
4 Mr. P. B. Fiedler Oyster Creek Nuclear i
Oyster Creek Nuclear Generating Station Generating Station cc:
4 Ernest L. Blake, Jr.
Resident Inspector Shaw, Pittman, Potts and Trowbridge c/o U.S. NRC 1800 M Street, N.W.
Post Office Box 445 1
Washington, D.C.
20036 Forked River, New Jersey 08731 J.B. Liberman, Esquire Comissioner Bishop, Liberman, Cook, et al.
New Jersey Department of Energy 1155 Avenue of the Americas 101 Commerce Street New York, New York 10036 Newark, New Jersey 07102 I
Eugene Fisher, Assistant Director Regional Administrator, Region I Division of Environmental Quality U.S. Nuclear Regulatory Commission Department of Environmental 631 Park Avenue Protection i
King of Prussia, Pennsylvania 19406 380 Scotch Road Trenton, New Jersey 08628 l
BWR Licensing Manager GPU Nuclear 100 Interpace Parkway Parsippany, New Jersey 07054 Deputy Attorney General i
State of New Jersey l
Department of Law and Public Safety 2
36 West State Street - CN 112
)
Trenton, New Jersey 08625
[
I Mayor i
Lacey Township 818 West Lacey Road i
Forked River, New Jersey 08731 i
D. G. Holland Licensing Manager Oyster Creek Nuclear Generating Station t
i Post Office Box 388 i
Forked River, New Jersey 08731 j
i
)
l i
l l
f g.- e f
Mr. P. B. Fiedler
-2 April 18,1986 Based on our review of your comitment discussed above during the staff's review of MPA B-24, we conclude that this commitment was not required by the staff as a result of a staff review of this ductwork. The commitment cane from your review of the pressure conditions in the SGTS ductwork following a LOCA. Therefore, based on ynur reevaluation as discussed above, we conclude that you do not need to install the pressure relief vent in the upcoming Cycle 11R outage.
t Sincerely, WM4 John A. Zwolinski, Ofrector f
PWR Project Directorate #1 Divisinn of BWR Licensino cc: See next page DISTRIRUTION
< Docket File OELD NRC POR GHolahan Local PDR OC File RWO#1 Reading JHulman RBernero BDLiaw EJordan Glainas i
BGrimes l
JPartlow l
CJamerson J0anchew JZwolinski ACRS (10) l l
.Y P
bteW n Nl M
,c
/
- 0FC
- DRL: PD#1
- DBL l
d
- BWP5/
- BWE9 g ( :DRL:PD#1 / WDBL:k.P1B.W.R............
....:. O nohew : tm : JHtb...... :
....f.
..... :............ :...fi nis
- ROCiak
- JZwolinski
- GL NAME :CJamerson
.J n
L........:............:............:............:............:...........
DATE : i/16/86
- 4 M /86
- 4 /L5/86
- N / U/86
- /\\/D/86
- d / [/86 m
OFFICIAL RECORD COPY
,