ML20245K241
| ML20245K241 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 08/11/1989 |
| From: | Vaughn H GILBERT/COMMONWEALTH, INC. (FORMERLY GILBERT ASSOCIAT |
| To: | Murley T Office of Nuclear Reactor Regulation |
| References | |
| REF-PT21-89-135-000 PT21-89-135, PT21-89-135-000, NUDOCS 8908180357 | |
| Download: ML20245K241 (6) | |
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Gilbert / Commonwealth, Inc. engineers and consultants P.O. Box 1498. Reading, PA 19603-1498/ Telephone 215-775-2600. Cable Gitasoc/ Telex B36-431 August 11, 1989 H. E. VAUGHN -
Vice President & General Manager Quality Assurance Division United States Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington,'D.C.
20555 Attention Mr. T. E. Murley, Director Re: Reportable Event Flooding Analysis Service Water Pump House
Dear Mr. Murley:
This documents my' report by telephone under the provisions of 10CFR21-on; August 8,1989, at approximately 3:10 PM.
Individual Who Reported Mr. H. E. Vaughn,.Vice President and General Manager Quality Assurance Division.
. Gilbert / Commonwealth, Inc.
Facility Involved V.
C.
Summer Nuclear Station operated by South Carolina Electric and Gas Company (Docket 50-395).
Activity Involved:
Service Water Pump House (SWPH) HVAC flooding analysis Nature of Defect An. error was discovered in the design of a non-safety, non-seismic portion of the SWPH heating and ventilation system.
A path was disc 9vered where the failure of the non-safety piping in the inlet air chamber could cause flooding of the Electrical Equipment Room of the SWPH.
Flooding of the Electrical Equipment Room (at El 425')
'~
could disable the "A" loop safety-related switchgear and motor control centers of the Service Water System.
The non-safety portion of the SWPH ventilation sys tecn is presently isolated, thus no further potential exists for this event.
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Green Hdis. Readm0. PA 19603-1498 G151752600 *525 Lancaster Ave;4 e. Reaom0 PA 19603-1498 G15)7752600 320 Cedar BluH haad. Su,k 300. Knomvdle TN 37923 (615: 6904389
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[ Gilbert / Commonwealth aspn wcomme
.Mr. T. E. Murley, Director
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August, 11. 1989 Page 2 of 2 Date Inforunation Obtained The' QAD General Manager was informed on August 8,
1989 of the deportability of this item.
t-Nussber and Location of Defect This situation has been reviewed and it has been determined to be unique to this modification for V.
C.
Summer Nuclear Station and does not represent a generic concern.
Corrective Action Ihis event will be reviewed with both the originator and the reviewer (s) of this modification package to stress the importance of considering all potential paths of flooding.
Additionally, a
training session will be conducted for all mechanical / nuclear engineers who are involved with design modifications for nuclear power plants, to review this event and methods to prevent recurrence. These reviews will be conducted within o ^
enth.
Very truly you s, w
\\
H. E. Va'ughn Vice President and General lanage b HEViceo cc T. E. Murley - NRC (2)
J. C. Stone - NRC - Vendor Inspection Document Management Branch - NRC D. R. Moore - SCE&G R. B. Clary - SCE&G A. R. Koon, Jr. - SCE&G C. D. Williams W. K. Burkhart W. E. Meek K. E. Nodland 1
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y Gilbert / Commonwealth, Inc. engineusansconsuaants M. P.O. Boh 1498, Reading, PA 19603-1498/ Telephone 215-775 2600. Cable Gilasoc/ Telex 836-431 August 11,.1989 yI H. E. VAUGHN -
p Vice President & General Manager
- Quality Assurance Division
. United' States Nuclear Regulatory Commission i
Office of Nuclear Reactor Regulation
' Washington, D.C.
.20555 Attention: Mr T. E. Murley,-Director Re: Reportable Event Flooding Analysis b
Service Water Pump House
Dear Mr. Murley:
This documents my report by telephone under the provisions of 10CFR21 on August 8, 1989, at approximately 3:10 PM.
Individual Who Reported
' ' ~
V Mr. H. E.,Vaughn, Vice President and General Manager-
. Quality Assurance ~ Division
-G!.1bert/ commonwealth, Inc.
Facility Involved V.
C.. Summer Nuclear Station operated by South Carolina Electric and Gas Company (Docket 50-395).
Activity Involved:
Service Water Pump House (SWPH) HVAC flooding analysis Nature of Defect i
An. ~ error was discovered in the design of a non-safety, non-seismic portion of the SWPH heating and ventilation system.
A path was discovered where the failure of the non-safety piping in the inlet air chamber could cause flooding of the Electrical Equipment Room of. the SWPH.
Flooding of the Electrical Equipment Room (at El 425')
L cn*Cd disable -the "A" loop safety-related switchgear and motor control s
centers of the' Service Water System.
I The ' non-safety portion of the SWPH ventilation system is presently isolated, thus no further-potential exists for this event.
1
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Gilb;rt/CzmmInwnsth $a.m.nocensuunts Mr. T. E. Murley,. Director
' \\[ sotarauuowtaan me ko an um a.ams m acme.m tsmea*ruiewn ar,e.
August 11,.1989 s
Page 2 of 2 l
.i.
- 1 Date Information'Obtained The-QAD -General; Manager was informed on August 8,
1989 of the deportability of this item.
Number and ' Location of Defect This' - situation.has ~: been reviewed and it has been determined to be unique' to this modification for V.
C.
Summer Nuclear Station and does not represent a generic concern.
' Corrective Action This event will be reviewed with both the originator and the reviewer (s) of this modification package to stress the importance of considering all potential paths of flooding.
i:
l Additionally',
a training session will be conducted for all mechanical / nuclear engineers who are involved with design modifications for nuclear power plants, to review this event and methods to prevent' n
- recurrence. These reviews will'be conducted within one
? %
4 i
l-Very truly you s, s
l.
l-
~
H. E. Vaughn Vice President and Genera 1 3ana D HEV:ceo ec - T. E. Murley - NRC (2)
J. C. Stone
.NRC - Vendor Inspection Document Management Branch - NRC D. R. Moore - SCE&G R. B. Clary - SCE&G A. R. Koon, Jr. - SCE&G C. D. Williams W. K. Burkhart W. E. Meek K. E. Nodland l
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' F Gilbert / Commonwealth, Inc. engineers and consultants P.0, Box 1498, Reading, PA 19603-1498/ Telephone 215-775-2600. Cable Gilasoc/ Telex B36 431 August-11,-1989 H. E. VAUGHN e
- Vice President & General Manager -
- Quality Assurance Division.
1 United States Nuclear Regulatory Commission Office'of Nuclear Reactor Regulation
~ Washington, D.C.
20555 Attention:- Mr. T. E. Murley, Director Re Reportable Event Flooding Analysis.
Service Water Pump House
Dear'Mr. Murley:
'This documents my report by telephone under the provisions of 10CFR21
.on August 8,.1989,Lat'approximately 3:10 PM.
Individual Who Reported Mr. H. E. Vaughn, Vice President and General Manager Quality Assurance Division.
Gilbert / Commonwealth, Inc.
/ E Facility Involved V.
C.
Summer Nuclear Station operated by South Carolina Electric and Gas' Company (Docket 50-395).
Activity Involved:
Service Water Pump House (SWPH) HVAC flooding analysis Nature of Defect
' An ' error was ' discovered in the design of a non-safety, non-seismic portion of,.the SWPH heating and ventilation system.
A path was-discovered where the failure of the non-safety piping in the inlet air chamber ' could. cause - flooding of the Electrical Equipment Room of the - SWPH.
Flooding of ' the Electrical Equipment Room (at El 425')
could disable the "A" loop safety-related switchgear and motor control centers of the Service Water System.
.The non-safety portion of the SWPH ventilation system is presently isolated, thus no further potential exists for this event.
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- Mr. T. E.;Murley,' Director:
N. Gilbert / Camman w=lth nem.m a con,ana caerahconomta me.n so ma n.ams s* merdam,saca.uu.urmaa -
August 11,11989 Page 2 of 2'
.K L-L Date Information Obtained :
The QAD General [ Manager was informed on August
.8, 1989 of the
. deportability of this: item.
Number and f.ocation of Defect I
This ' situation has been. reviewed and '. it has been determined to : be unique to this' modification for V.
C.
Summer Nuclear Station and does not represent a generic concern.
-Corrective' Action
-This-event will be reviewed'with both the originator an'd the reviewer (s) of this ' modification ' package to stress the importance ' of considering all potential paths'of flooding, g
Additionally, a
training session will be conducted' for. all mechanical / nuclear engineers who are involved with design modifications for. nuclear power plants,. to review this event and methods to prevent recurrence. - These. reviews will be' conducted within o ^
-^*h.
Very truly you s,.
q i=
H. E. Va'ughn Vice President and General 3anag D HEViceo
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T. E. Murley - NRC (2)
J. C. Stone - NRC - Vendor Inspection Document Management Bracch -- NRC D. R.. Moore - SCE&G R. B. Clary - SCE&G A. R. Koon, Jr. - SCE&G C. D. Williams W. K. Burkhart W. E. Meek K. E. Nodland m_-m_i
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