ML20072K331
| ML20072K331 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 06/24/1983 |
| From: | WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML20072K321 | List: |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8307060237 | |
| Download: ML20072K331 (6) | |
Text
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ATTACHMENT II WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET N0. 50-397 LICENSE N0. CPPR-93 10CFR50.55(e) CONDITION #258 RHR HEAT EXCHANGER INSTALLATION INTERIM REPORT Description of Deficiency The RHR system has been subjected to an independent design review.
A review of the RHR heat exchanger installation package identified that the installation requirements of General Electric specification 22A5233 " Installation Instruc-tion for RHR Heat Exchanger" were not complied with.
Requirements for shims to be placed to meet the requirements of FIG. 5-1 and 5-3 (attached) had not been implemented. Field inspection verified that the shims had in fact not been installed as required.
This specific deficiency identified a possible breakdown in the contractor's system for assuring that equipment installation requirements were properly tracked to completion and complied with vendor installation requirements.
Safety Significance The requirements for shims on the RHR heat exchangers (Ref. Attachment 3) at the bottom support are to transfer shear forces into the baseplate, and at the top keyway brackets to control movement, both conditions imposed by a seis-mic event. The absence of the shims would impose undefined loads into the building support structure, the heat exchangers supports and connected piping, which is unacceptable.
The implications of other safety-related equipment installation not being com-plete or in compliance with vendor installation requirements is a potential generic deficiency for which the safety significance can only be evaluated after an extensive review by the contractor (Bechtel).
These conditions are considered to be a reportable defic 1 m, $nder 10CFR50.55e.
Corrective Action The contractor review determined that an open PED (215-CS-2677, dated A;,ril 8, 1980) existed concerning shimming the top keyway (guide) which indicated the contractors (WBG/Bechtel) were aware of shimming requirements in this area, l
although they had never been implemented.
Due to the status of construction on the baseplates, Burns and Roe issued PED 215-CS-P531 to install new shear plates in lieu of the shims indicated in FIG.
l 5-2 (attached). The contractor has completed implementation of these PED's (215-CS-2677 and 215-CS-P531) and is also conducting an extensive review of the equipment installation and align records. Three hundred eighty-three (383) equipment packages have been identified for review and sixty-three (63) have been completed as of June 20, 1983.
8307060237 830624 f"DRADOCK 05000397 PDR
No formal evaluation has yet been made of the findings resulting from the s
review. Corrective action determined to be required is being processed via normal project procedures. The review is scheduled to be complete in early August.
We will continue to provide your office with quarterly updates. The next report will be submitted on or before September 21, 1983.
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