ML19262A224
| ML19262A224 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/17/1975 |
| From: | Arnold R METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19262A219 | List: |
| References | |
| 74-03, GQL-0665, GQL-665, NUDOCS 7910260563 | |
| Download: ML19262A224 (2) | |
Text
{{#Wiki_filter:_ W r/27J 90erte 900 **OGAf 32 _y, METROPOLITAN EDISON COMPANY PCST OFF!CE BOX 542 RE ADING, PENNSYLV ANI A 196C3 TELEPwCNE 215 - 929-3601 . y, <, 's x .-[d i, l I d gal C665 co.c oD "~ -l JAN 1. C _ pg ai s~ y; i. s .s A .N? Director Directorate of Licensing U.S. Atomic Energy Commission Washington, D.C. 20545 Mr. J. P. O 'Reilly, Director Directorate of Regulatory Operations-Region 1 U.S. Atomic Energy Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
==Dear S
- rs :==
?>ocket No. 50-289 Operasing License No. DPR-50 Nonroutine 30-Day Repor* 74-03 In accordance with the requirements of 6.7.2.b of the Technical Specifications for our Three Mile Island Nuclear Station Unit 1 (TMI 1), we are subsitting this nonroutine 30-day report. The report deals with a deficiency of desigt. of the pipe support fer DH-V-19B outlet of the B Decay Heat Removal Cooler wnich was discovered on December 19, 1974. We trust that this submittal satisfies the reporting requirements referenced above and adequately answers any concerns you may have. Sincerely, 3 l \\ ' < '. kNtw R. C. A.. ld Vice President RCA:TS B :cas Enclo sure Nonroutine 30-Day Report 74-03 File: 20.1.1/7.7.3.6.1
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ENCLCSUPE Metropolitan Edison Ccapany Three Mile Island Nuclear Station Unit 1 (TMI-1) Docket No. 50-289 Operating License No. DFR-50 Nonreutine 30-Day Report TL-03 Notification of s Deficiency in Design of Pipe Suppcrt for DH-V-193 1. Descrirtion cf Deficiency On December 19,197h, during a routine inspection of the Auxiliary Euilding, it was noted that a concrete fccting for DEH-ll7, a rigid pipe support for DH-V-193 (the cutlet valve cf the 3 Decay Heat Removal Occler), was cracked. Further investigation revealed that the entire one-inch facting was breken into large pieces which could be easily removed frca under the base plate. Also, it was discovered that another footing was cracked. It has been determined that the brcken footings do not ecmprc=ise the support of DH-V-193, as four of the retaining six footings are intact. In addition, spring hangers located on adjacent piping near the valve could serve to support the valve if required. 2. Corrective Action A check =ade of other footings in the area revealed no problems. The ecmpanien support for A Decay Heat Rencval Cooler Valve, DH-V-191, was checked and found to be of a different design, and no problems were discovered. It has been de' ermined that the design of the support was inadequate in that the bace plate "as not large enough to properly distribute the lead. In addition, shins should have been used under the base plate to help transfer the lead. Also, installation appears to have centributed in that the flecr surface was net properly roughened, a bending agent may not have been used, and the bolts may have been tightened before the greut had cured properly. With regard to the failed fcctings, a design review was undertaken by Metro-politan Edison's Architect Engineer and a revised design for the fcotings was precared. The new design incorpcrates the use of larger base plates cn all six footings, shims, roughing of the floor s trface, a bcnding agent, a curing agent, and fcur floor bolts rather than two as in the previcus design. The new footings '.cill be put in place, utilizing the new design, at the first cpportunity. t482 279 249103 e o- =g --}}