ML19305A765
| ML19305A765 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 02/21/1980 |
| From: | Hinrichs G JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19305A763 | List: |
| References | |
| IEB-79-14, NUDOCS 8002270291 | |
| Download: ML19305A765 (2) | |
Text
.
initial Telophona Date of
- Report Date
Occurrence:
February 20, 1980 Toitial Written Tfma of R: port Date:
Occurrence:
3:50 D.;3.
OYSTER CRFEK 'nJC1. EAR r,ENE9ATING STATION FORKED RIVER, NEW JERSEY 06731 Reportabla Occurr+nce Report No. 50-219/80/10-1P IDENTIFirATION Ouring verificatian af at-huilt conditions for pipe hangers, it OF CCCURRENCE:
was nat'emi that thr== pipe hangers in the liquid Poison System worn not properly installed.
Th h avant is enasiderad to be a ragmrtabla occurrence as defined in tha Tachn ica l Spec i f ica t ions, paragra ph 6. 9. 2.a. (9).
- 0NDITIONS P910R Staadv Stata Powar Routina Shutdown TO OCCURRENCE
Hat Starwthy Operstion 001,1 Stiutdown Loa <f Changes During X _ Pafnel ing %ut.deman Routine Powar Operation Routina s tartup Other (Specify)
Operation Reactor subcritf<=1.
Reactor maria switch Inci ed in refuel.
t Cavity flooded.
IESCRIPTION On Wadnasday. Feernary 20. ITO, at approximately 3:50 p.m.,
- F OCCURRENCE
during the inspectinn rmuira<1 for TE Bullatin 7e-14, three pipe bangers wara discovera<t impraparly installad.
The pipe hangers that vastra in a vertical section are numbered NP-2-R8A, NP-2-R88, and NP-2-R9.
Thase hanger numbers are referenced on Bergen-Patterson Drawings.
Aleo a rattraint, NO-1-R2 on t hg return 1 fne of the cleanup systen was of the incorract design.
Tha systen requires restraint of tha pina in tm directions and ND-1-R2 was only capable of one directfocal restraint.
6PAMMT CAIME Dasion Procedure F OCCURRENCE:
Manu fac tura Unusual Service Condition X
Ins talla t.f on/
Tnc. Envirnnmental Con 5tructinn Camponant Faf1ure Opera tor Other (Specify) l The pipe hangers warn improperly installed.
MCA \\
80022W M i
- 2. 9 l
Reportchla Occurennra R: port No. 50-Zl9/80/10-1P Page 2 A.' sat Y319 OF The plea nanunr. ara u m a<f to rastr,in a pipe frnm oxen.ssive CCCURRENCE:
movnmant durino a = I mir avant-The thrae hancers all penvide horirnntal restraint on t.ba eartIcal pipe.
The hanger wnich consists of a t iva c 1 mn wi th two lugs w ided on the outs ide of tha cl. imp 90~ fena the tilpe cin=p on<f should rest in a square box mada of angle iron.
The fnur aqu idistant externa l points shnuld rest on tha cantar of tha flats of the box.
The how is rigidly suonarted to the drywell wall.
Thararnre. If properly installed, the oina woul:1 ha a llenva<f min imal hne tzontal movement.
The hancars were ronn,f wi t h the s
e pa clamn incated above the restraining box which would parmit excessive movmant of the pipe in a seismic event.
Tha 1.1qul<l Pnisan Sy5 tam Is a sean<ihy radundant, independent rnnteni tyste for use in t he i ni t kal y ovant tha t the control rod sys tem is innpar=bla.
Tha ifquid "afton System is actuated only by r mote wuinual actinn fram the Control Room and will be used only during extrame amargency condit ions.
The claanup svstam is a riltratson and tonization exchange system for ww intaining the purity or tha water in the reactor vessel and rectre.nlatinn lines.
The restr= Int in the return line was only capehta of rastraint in ona af f raction, therefore, the pipe j
restraint would be considarmi inoperable in a seismic event.
RORRECTIVE The ITION:
hanuars in the L.iquid Poison Systesn were properly reset in the boxes.
The rastraint in the cleanup systemi is urufer a design review to correct the dnf fc f ancy.
ILURE DATA:
Not applfcable.
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