ML20092L102
| ML20092L102 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 12/09/1983 |
| From: | Conn L BURNS & ROE CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-PT21-84 BRGO-RO-83-18, NUDOCS 8406290246 | |
| Download: ML20092L102 (3) | |
Text
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Burns and Roe,Inc.
601 Williams Blvd. s Richland, Washington.99352 m Tel. (509) 943-8200
Subject:
Work Order 3900/4000 Washington Public Power Supply System WNP-2 Incorrect Installation of Solenoid Operated Containment Isolation Valves Responds to:
N/A December 9,1983 BRG0-R0-83-18 Respon'e Req'd:
N/A s
Office of Inspection and Enforcement U.S.. Nuclear Regulatory Commission Washington, D.C.
20555 t
Attention:
Di rector
Dear Sir:
This letter is to report to you a condition we have deemed to be reportable under 10CFR21.
The condition relates to incorrect orientation of solenoid operated containment isolatiori valves and was discussed with fir. D. Haist of your Region V office on December 9,1983.
i.
Complete details are contained in the attached report.
If you have any questions, please contact W. G. Conn at (509) 943-8241.
Very truly yours, W4' M
~
W. G. Conn
.s Licensing Supervisor WGC/sw Attachment cc:
BPA - Mr. W. S. Chin SS - Mr. G. L. Gelhaus, w/a SS - Mr. L. T. Harrold, w/a SS - Mr. J. G. Tellefson, w/a SS - Mr. R. T. Johnson, w/a
'NRC "r. J. 8. Martinr-wfa-Re~gion V 8406290246 831209 PDR ADOCK 05000397 S
PDR l
INCORRECT INSTALLATION OF o
SOLEN 0ID OPERATED CONTAINMENT ISOLATION VALVES #83-23 Description of Deficiency Several small solenoid operated primary containment isolation valves were found installed such that containment press'ure would act to unseat the valve.
- Thus, during a design basis isolation event, these valves would leak excessively.
Date and Method of Discovery This deficiency was first identified to Burns and Roe on November 15, 1983.
Ex-cessive valve leakage was originally identified by the Supply System Test and Startup organization during local leak rate testing as required by 10CFR50 Appen-dix J some two weeks earlier. '
Safety Implication i
Excessive Isolation Valve leakage during a design basis isolation event could re-sult in exceeJing 10CFR100 limits regarding radiation dose at the Site boundary.
Cause of Deficiency _
The cause of this deficiency is that Burns and Roe, Inc. did not provide sufficient instructions to the installation contractors to assure proper orientation of the valves.
However, this was due, in large part, to the sequence of design, procure-ment and installation.
That is, the installation contractors were also responsible for procurement of the isolation valves in accordance with general specification re-quirements.. The requirement for a specific installation orientation could only be determined after a specific manufacturer and valve type were selected by the con-tractor.
It could be argued that the contractor was responsible for correct orien-tation since he did the procurement.
Applicability to Other Projects This type of deficiency is potentially applicable to othe. projects. However,100 l,
percent functional (leakage) testing as required by 10CFR50 Appendix J would pre-clude it from remaining undetected.
That is, all incorrectly installed solenoid operated isolation valves would be identified due to excessive leakage and would be corrected.
Action to Prevent Recurrence A complete review of the installed orientation of all solenoid operated containment isolation valves was performed.
All deficiencies were identified and corrective action taken 'through design modification (PED).
Corrective Action Design Changes (PED's) have been issued to correct the installed orientation for all deficient valves.
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-PART 21 REPORT LOG SHEET 1.
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Date Verbal Notification Received - ///#7/8J Received By - D /////57"
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Date Information Placed 'in Daily Report - /2
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Name and Address of Person Providing Verbal Notification a)
Name - Sit L CoAJL/
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Company and Address - /3u2A/S Miv/) /2ce, //vc
/EtctriM, IL/a.syiui2d c) Telephone No._ - Ed f-9p'J-T527/
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Description of' Problem - h M t.t dol &orn CyYM10D f> LOSE VALt/CS MGL (h e ceu 7?>in/17e d f / & t n ?>;a yl2/LG iMinngs) Si.u/ 7)my (wawa:sj N
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Qtg D/S/c /rM CstuSc-77tt VAw2 7Z L cils' Nuclear Facilities Affected - IMdP-2, C)dJ G4-397 6.
7.
Date'5-day Written Report Due -
/ 2. //, D_
Date Received - / !N I7 2
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8.
Mail' Written Report'to HQ's and Other Affected Regions a)
Date n to HQ's (
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69 /Q b)' 'Date Mailed' to Other Regions -
Regions Mailed To - All-9.
Give Written Report to Each Region V Affected Principal Inspector a), Date Given to Principal Inspector (sl -
b)
Name(s) of Inspectors Given To -
l Additional Comments - /EE/D/:r1p //5 $0.55 (O ffDy Mt 50 cM) 12l}jfG 10.-
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