ML20010G117
| ML20010G117 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 06/06/1980 |
| From: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-80 10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-478, NUDOCS 8109150349 | |
| Download: ML20010G117 (2) | |
Text
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per '
The Light g)
Company a-= u iin,,g u,m m aano no.m.m,mbs.w s
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June 6,1980 ST-HL-AE-478 SFN: V-0530 Director, Region IV Nuclear Regulatory Commission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76102
Dear Sir:
South Texas Project Units 1 & 2 Docket Nos. STN 50-498, STN 50-499 Interim Report on the Containment Gas Analysis System Overpressurization On April 24, 1980, Comsi,, Inc. reported to your ofrice pursuant to 10 CFR 21 a possible defec: in containment gas analysis systems manu-factured by their Delphi Systems Division.
In their letter, they identi-
/ ~
fied South Texas Project Unit; 1 and 2 as facilities whera the component
\\
will be utilized.
Mr. Tom Jordan of HL&P discussed this matter with Mr.
H. S. Phillips of your office on May 16, 1980.
l During a subsequent conversation with Mr. Phillips on June 4,1980, l
he stated that Houston Lighting and Power Company would be required to j
furnish your office with a written report pursuant to 10 CFR 50.55(e) if l
the component identified above had been delivered to the STP site.
Mr.
Phillips confinned this interpretation with Mr. Bill Crossman of Region IV.
I I
On June 5,1980, HL&P confinned that the eqaipment had been delivered to the STP site and informed Mr. Phillips via telephone that same day. Mr.
Phillips requested an interim written report on the matter.
As stated in the Comsip letter of April 24, 1980, repair kits will be furnished to all ;icenseas as soon as possible.
To date, HL&P has not re-ceived a repair kit; but, efforts are being made to expedite this repair.
Mr. H. S. Phillips will be notified when the repairs have been completed and a Final Report will be submitted to your office.
Very truly yours, l
< a. / ~ ~_
E. A. Turner
(
Vice President Power Plant Construction m
I
& Technical Services c)
LRJ/mf 8
8109150349 810606 PDR ADOCK 05000498 I
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PDR l
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euce DCLPtf! SYS1f u$ OfvtSION 10050 L P n h 5teegt instrumeni and control sysfems ilifAT.a.i '
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c ut...w April 24, 1980 RO:(oOf/
ST-CD-HL - VaOb.
Houston Lighting and Power Company P.O.
Box 1700 Brown and Root Building #3 Houston, Texas 77001
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Gentlemen:
t l
to the recent investigations of normal nuclear power Pursuant Comsip, Inc. has found that substantial
(' ant operation, containment gas analysis sytems may occur nage to the inlet and return lines are closed off while
-.ien the sample tha containment gas system pumps are still running.
Sinca the plant operating procedures are beyond our' contro'1, and the resulting damage may pose a safety har.ard once these lines are opened, Comnip, Inc. is issuing the following work Once impicmented, instructions to modify the system pumps.
the automatic or manually operated sample line isolation volves may be closed without subsequent damage to the containment gas system.
find enclosed A copy of the report to the NRC which that it was reported Please initiated this field rnodifica. Ion.
Note I
under the requirements of 10CFR71.
The above modification l
10 mandatory and Comsip urges you to contact us as soon as l
possible so as we may provide the modification kit to the l
proper individuals.
Ve uly yours u6 e Anas asi 7
Customer Service Manager n E C EIV ED
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1 phi Systems Division APR 3 01980 (un/kp l
'Lso frfi TEXAS PROJECT
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4213)442 0882
'I Teles 67-4768 3 April 1980
%0 " N g,.c o v.-i. ' ",,
Mr. Robert H.
Engelken 4
Director, Region V
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kECf!Y,JO.:.
Office of Inspection and Infor. ment
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U. S. Nuclear Regulatory Commi.:.sion CC i.
t 1990 N.
Cali fornia Boitlevard, Suite 202
-l j?.,3 Walnut Creek, California 94596 i-
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Subject:
10CRF21 Requirements /
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Existence of a Defect Gentlemen:
As'requiredsby the subject regulation, the following report is made in triplicate.
Firm Identification:
Comsip, Inc.
Delphi Systems Division
(
10650 E.
Rush Street So. El Monte', California 91733 (213)442-0882 Responsible Officer making Report:
Claude Varinois, President Type of Business Activity:
Manufacturers; Containment Gas i
Monitoring Systems l
Notification of Defect as follows:
l I was notified yesterday, 2 April 1980, that while in-house l
testing war bei.ig conducted, the following failure occured.
The contents of the report made to me by one of our Test Technicians follows:
Subject:
8^-637 "K" Pump Malfunction 1
During the testing of 80-637, one of the panel outlet valves was closed while the panel was shut-
'down.
The pump was then started with the valve
(
still closed.
The followins occurred;
)
- 1) The pump deadheaded for no longer than 20
- ucconds, 1
N0 hhS a
1 l
- 2) The precaure at the pump ourict execeded f
150.pcig, I
- 3) The pecuuure buildup caused the connecting rods to separate from the crank shaft causing a tremendous strain on the diaphragms.
It is conceivable that these diaphra5ms could have ruptured, therehy breaching t'he integrity of the system.
The panel valves arc one cause for such an event, but also the "It" stamp containment isolation valves, which are cometimco automatically ~
closed, could cause the same malfunction.
To remedy the prob 1cm, we could install a check valve acrocc the inlet and outlet of the pump.
In the event of any valves being closed in the system, the check valve would prevent any damaging build-up of pressure."
s The above report make.. clear that either of the following two safety hc7.crds exist:
1) up to one litre of containment gas could be released into the outside atmosphere, should the f ailure as s
de"ined above occur; and/or 2) if the input / outlet valve is closed while the pump is in operation or if the containment isolation valve inside the containment is closed, there is a riu'A in damaging the system, thereby rendering the system inoperable.
Locettion of Faciliticu where the component exista:
- Pennsylvania Power and Light Susquehanna/ Units 1E 2 Mississippi Power and Light Grand Gulf / Units 1 & 2
- De'troit Edison Enrico Termi/ Unit 2
/ Alabama Power Company Jou. M.
Farley/Unita 1 E 2
~g_.f{x a p3p? '-]]i any Qow g&C om c ap.cge, GEM,y.gq q ;;@,g g >J' M 516-E f_ y 0 ( .u / ff ~ I I
-a =: / l c - Tennessee Valicy Authority Scouoyah/ Units 1 E 7 - Tennessee Valley Authcrity Watts Ecr/ Units 1 5 2 - Ari zona Nuclear ~ Proj ect Palo Verdc/ Units 1, 2 'E 3 - Georgio Power Company Hatch / Unit 2 To the best of our knowledge, none of the plants to which thic component has been supplied is' currently in operation with the exception of Georgia Power Company, which is currently shut down for maintenance. Corre?tive Action to be Tcken: We arc in the pr occu u of put ting a by-pass on the discharge of the pump to prevent deadheading, thereby preventing any damage. This corrective action will be it.troduced on the Cleveland Kuclear Plant and will be added on all future jobs. Notification of Tacilities/ Purchasers: Notification will be'made to the above facilities immediately of the defect and the corrective actions being taken and that kit will provided them ou voon as possible which will totelly 4 correct any possibility of failure / damage. for further information, the work necessary to comnlete this corrective action is very minor in nature and can be easily ( accompliched on uite by a quellfled piperitter. Should your organization require any further infornati .3, I suggest you contact directly our Technical Director, P.r. Al Robinson. l Sincerely, COMEIP, Inc. --Delphi Systems Division / Q ..(p, () LM_ n Claude Varinois./ Presiden: 1 yCV:ns .}}