05000278/LER-1979-019-01, /01T-0 on 790621:during Seismic Support Insp Program, Reactor Core Isolation Cooling Piping Anchor Discovered to Have Two Bolts That Could Not Be Torqued. Caused by Improper Installation of Bolt Shells

From kanterella
Revision as of 08:14, 3 January 2025 by StriderTol (talk | contribs) (StriderTol Bot insert)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
/01T-0 on 790621:during Seismic Support Insp Program, Reactor Core Isolation Cooling Piping Anchor Discovered to Have Two Bolts That Could Not Be Torqued. Caused by Improper Installation of Bolt Shells
ML19268A258
Person / Time
Site: Peach Bottom 
Issue date: 07/06/1979
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19241B440 List:
References
LER-79-019-01T, LER-79-19-1T, NUDOCS 7907170166
Download: ML19268A258 (1)


LER-1979-019, /01T-0 on 790621:during Seismic Support Insp Program, Reactor Core Isolation Cooling Piping Anchor Discovered to Have Two Bolts That Could Not Be Torqued. Caused by Improper Installation of Bolt Shells
Event date:
Report date:
2781979019R01 - NRC Website

text

di n. e a n u.1,s.t.

is. ta ut.L L A H ni t.t # L,g U t i v' c t )n.11:J son l1-19 )

li i t 3 LICLNSEF EVLN l(LPOlli aeport No.

3-79-19/1T coNrsoLutoco l l

l l

j l

o@

l (PLE Abt PHIN T OH IYet. AL L HLQUlHED IN F OHf.1 AflONI i

o Ii eiAlPIB lS I 3 IGL.oI ol -lo o oI o o - o'oIQI4l1li 1 I il@

l 1G i

J 9 LICENSEE CODE 14 15 LICENSE NvMsER 25 2 r, license TveE Jo si car so CON'T

o i!

C'O% LL_]@l o i s I ol - 1 e l z 17 la lQi 016 12l1l7l9l@lol7[o 6 7 9j@

4 W

bl DOCKET NuutsE H Les us EVENT OATE 14 S

REPORT DATE C

LvtNT DESCRIPTION AND PHOOABLE CONSEQUENCES h l

Ac r2M of the ceicmic support incpection program initiated by IE Bulle-o

/

oI.

I tin 79-02, an anchor associated with the RCIC piping was found to have I

o1a l two bolts which could not be properly torqued. An ongineering analysis I

oI, I

was perfaced and determined that the anchor would not be capable of l

o 6

[_

withstandirs a corabination of operating and seismic icads without over-I

,oi 'il stressiv the other anchor bolts. Safa:7 si.mificance is mia N, sinca i

io u

l HPCI was available and probability of a seismic event is small.

I i

a e a

SYST E M

CAUSE

CAysE COMP VALVE COCE CODE SUSCODE COMPONENT CODE SUSCODE SUSCODE l C l E l@ l B l@ W @ l S i U l P l 0 l R lT l@ [Bj @ l Z @

olo 7

d 9

10 11 12 13 14 19 20 "f OUE N TI AL oCCU A H E NCE REPORT HEVISION tg anig EVENT YE AR R EPORT NO.

COUE TYPE NO.

@ REPo0T l 7l 9]

- l [ol1l9l

],/l lo l1 l lTl l-l lol

_ 21 27 23 de 46 77 2tl 29 30 ll 32 At. l i O *4 r u r u s 4 s.

EFFECT SHU 1 GovvN A TT ACHME NT NW A D-4 PRIMC CCMP.

LOYPONENT TAKEN ACTIUN QNPLANT METHOO HOOHS SL8MITTED FOHM aute SUPPLI E R MANUFACTUREH 4

LA_J@LF_J@

l Z l@

QJ6

.lololo oj lY l@

lY l@

lNl@

l Il 210 9 l@

JJ J4 34 J +.

40 41 42 43 44 4/

CAUSE DESCRIPTION AND CORRECTIVE ACT!oNS R--] l The failure to reach the troper teraue was caused by improper installa-

_]

[: i, I

tion of the bolt t tells. The defective bolt shells have been removed and I

p' i. j [

replaced by wedge type anchor bolts. An additional support strut has

[

pgl been installed to increase the load carryir.g capability of this support 3

r ;-

l to attain a minimum anchor bolt c1fety factor of five.

r acii iT y VE Tl*CD CF a

STATUS

%*OWER QTH E R S TA'. US DISCOVkRY DISCOVERY DESCRIPTION 4/

rq l C g 10 oo@

N/A l

l big l visual Inspection g

i a j

'n 12 11 44 45 4c Re AC Tive l y LUN TENT LtE L L A',, EI) PF H L L k A~,b AMOVNT CF ACTIVITY LOC A TION ')F HE LE ASE

  • Li_l LZJ @ I Z !@l N/A l

l N/A l

,0 6

'3

... son ma:.u.I. a 44 45 PO N U MlJ f H TYPE O E SL H4 P TION

'N Pij010 0 !@l Z l@L NA t

1

')

11 17 13

  • E RLONNEL INJVRIES 30 NUMGEH OEf CHIPTION E, O l o i 0101@l N/A l

i, i2 I U' ' i)l' illt [j AM AGf TO F ACI LI TY 1 'P1

H ?,Lisiv i10*4 F ii N/A

,, 3 7 0 / M j

i s

'l

't3 1) l'.gy t LHiPT ON I

tu_aL1!@l N/A um i i i i iItiiiiiiI-(

m j

M. J. Cog m !

c i, ou o.

(2W 8414020 vy?

N.w e a g negAneR mgug

- 1