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Power Supply Engineering and Services CeOrgia Power we scurnem e ect:c usier March 22, 1978 United States Nuclear Regulatory Co==ission Office of Inspection and Enforce =ent
REFERENCE:
Region II - Suite 1217 RO: II: JPO 230 Peachtree Street, N.W.
50-321 Atlanta, Georgia 30303 ATTEdrION:
Mr. Ja=es P. O'Reilly Gentle =en:
The following infor=ation is submitted in response to your letter of February 10, 1978, requesting infor=ation cencerning II Bulletin 7E-03.
The nu= bering sequence used herein is the same as that used in the Bulletin.
1.
A review of all operating procedures has been conducted.
Based on this review we find our procedures to be adequate to =eet the syste='s design cbjectives. Although there are no proce-dures prohibiting welding on the offgas syste= which =ight result in an ignition by an are strike, there are several =ea-sures which serve this purpose. First, a welding permit is required before any velding is perfor=ed.
Second, a =aintenance riquest is needed before work is allowed to proceed in an area.
As a result, guidance to workers is provided by personnel know-ledgeable of the dangers of such an ignition source.
The offgas syste= presently has purge capabilities; this provides additional assurance that welding can be co=pleted safely.
2.
The design of the offgas system does not =ake use of any rupture disks or allow bypassing the recombiners.
Loss of dilution flow is annunciated in the =ain control roo=.
Hydrogen cencentration is =enitored at the exit of the reco=biners.
Additionally, opera-tion above 1% is alar =ed and above 4% hydrogen is not per=itted for extended periods without a unit shutdown.
These =easures will prevent release of hydrogen or fission product gasses to the environs.
364.
The only location using loop seals open to the environ =ent is the Waste Gas Treat =ent Building.
This building has a ventilation system which routes contaminants to the =ain stack.
Operating procedures cover the startup of the offgas syste= when pressure surges are =ost likely to occur.
Should a loop seal blow out, the radiation =enitoring syste=s will detect the event and alar = in the =ain control roo=.
Operating personnel are capable of quickly restoring these loops by use of a de=ineralized water refill line.
8301100139 821207 PINT FOIA HIATT82-545 PDR
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~ Georgia Power b C.S. Nuclear Regulatory Commission ATTN:
- t. Ja=es ?. O'Reilly
'Page Two March 22, 1978 5.
' We are planning to develop an emergency procedure for handling offgas system conditions which threaten the integrity of the system.
We expect these procedures to be implemented by Sep-tember 30, 1978.
Please contact my office should you require additional information.
Very truly yours,
/s4 e l~
R. W.,Staf a N
/ ansfer of' Qua h ty Assurance CTM:
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U. S. Nuclear Regulatory Cocruission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D. C.
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