ML19322C102
| ML19322C102 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 12/06/1976 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Goller K Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19322C104 | List: |
| References | |
| IE-RID-76-25, NUDOCS 7912300086 | |
| Download: ML19322C102 (2) | |
Text
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DEC 6 1976 Serini Go..:
IE-RID _-76-25 TRidSITR Or LEAD ICSPONSIBILITY I
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To.
Karl R. Coller, Assistant Director for Operating T.eactors, NRR
Subject:
FLOODIHG OF T JUT 'E BUILDIEG AT OCOJEE L' NITS NCS.
1, 2 & 3 bOCC:T LOS.60-269 50-270 and 50-287 Reaponsible Branch Chief: Earl V. Seyfrit Deecription of Iten Eequiring lesolution:
I Da Oct cher 9,1976, flooding occurred in the turbino building. Unit No. 3 was chut down for refueling. Tae Unit Mo. 3 condenser had five manways open for maintenance.
Tne incident occurred when the cloctrical supply to tho air controllers on tite six 78-inch condenser outlet valves was lest. This caused the valves to attecpt to open. Que of the six strongbacks, installed on the valves as a aufety manaure, failed and one 78-inch valve opened. Ine laka water back-f1 wad throurja the open mauways until electrical power uas rastored 32 ninutes later, and tite open valve vaa closed. The water care within five inches of flowing over the curos 2 at the entrances to the auxilicry building. Turther l
flooding could nave rendered the high pressure f njection, low pressure injaction, l
contain tent spray and all sources of water to the uteam generators for all i
units inoperabla. Tae turbine and auxiliary buildings are corcon to all units.
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Eo poscibility c::ists for en incident which could cause rore severe flooding from rupture of a pipe downstrea:n of the 76-inch condeuser valve in the turbine building or failure of the valve bcucings.- Anotner possibility is
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rupture of the condenser which could da= age the outlet valves adjacent to i
the condenser. A seismic event could cause such a failure.
hacorsendations and Proposed Course of Action:
1.
The Division of Operating:Eeactop (DOR) will ' review the flooding incident and detaruine if the licensee's proposed rourse of action is appropriate.
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.60-24y M 4 l
7912300 Q M
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i Karl E. coller DEC 6 1976
,% At e conclukign of the re ew, DOR v otify th Offica Inspec ion and Eh'orcevent (
of their ra ts.
I here is need for ad' ional inf tion or ne require:aenta e to L imposed a I
the licen both tta licensee an IE vill be a advise
- h. IE vill provida additional inforcation as required and verify adherence I
to any uwv requirements irposed by DOR.
Concurrence:
Boyca H. Crier, Lirector, Division of Reactor Inspection Prograrg, IE Date Karl h. Goller. / assistant isirector for Operating Reactors, ERR Date Enclosures 1.
Harorsadu= frou F. J. Long to K. V. Seyfrit dated October 29, 1976, 2.
Licensee Event keport RO 287/76-18 dated October 25, 1976.
l cc:
V. Stallo, OP.
l A. Schwencer, OR i
D. J. Neighbors, OR I
D. Thoceson IE C. W. Rainmuth, IE l
st d ution:
K. V. Seyfrit, IE IE Files l
J. H. Sniezek, IE Central Files (3) l C. W. q,,H IE Reading J. P. O'Leilly, IE:I RIP Reading M. C. Eosaley, IE:II BH Grier J. C. Keppler, IE:III 1
JA Dyer E. H. Howard, IE IV R*IAB hading j
R. H. Engelkan, IE:V T. Abell, HIPC i
H. K. Shspar, ELD I
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F21244H1 RIP-984 or sc = *
.. RIP :RTAB -- -RIP 2IAB
-RIP
-DOR i
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-JA -Dyer -cd - -KV-Seyfrit--
BH Grier KR Coller--
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/76
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176
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/76-Toren AEC-)l3 (Rev. 9-53) AECM 0240
- u. s. novan=mesmet pae= Team orrects ser..sae.noe
t/);;;va na.w _
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000 1976 Karl R. Golier
/
IT will provide additional information as required and verify adherence A
ny new requirements imposed by DOR.
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Concurrence,:
J t IE Date Boyce H. Grier, Director, Division of Reactor Inspection Programs,
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1 Date E*4 Karl R. Goller, Assistant Director for Operating Reactors, DDR 1
q,j i<
w i:. '
29, 1976 Memorandum from F. J. Long to K. V. Seyfrit dated October
Enclosures:
Licensee Event Report RO 287/76-18 dated October 25, 1976 1.
2.
V. Stello, OR cc:
A. Schwencer, OR D. J. Neighbors, OR D. Thompson, IE G. W. Reinmuth, IE 5
K. V. Seyfrit, IE J. H. Sniezek, IE G. W. Roy, IE J. P. O'Reilly, IE:I N. C. Mosely, IE:II J. G. Keppler, IE:III E. M. Howard, IE:IV R. H. Engelken, IE:V i
T. Abell, MIPC H. K. Shapar, ELD s
SEE PREVIOUS YELLOW FOR CONCURRENCES RIP:RTAB RIP:RTAB RIP 00R JA0yer KVSeyfrit BHGrier KRGoller 1
11/29/76 11/ /76 11/ /76 11/ /76
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