ML19289F168

LER 78-038/01T-0 on 780908:one Point on Piping Outboard MO-12-15 Had Stress During DBE Above Code Allowable. Restraint to Be Added to Code

ML19289F168
Person / Time
Site:	Peach Bottom
Issue date:	09/22/1978
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289F167	List: ML19289F166 ML19289F168
References
LER-78-038-01T, LER-78-38-1T, NUDOCS 7906040368
Download: ML19289F168 (1)

Text

NRC FORM 366 L WUCLEAH $4EGULATOM LUAtAiaSslurd (7 77) ** * *

. Unit. 2 ,

.. LICENSEE EVENT REPORT Report No. 2-78-38/1T CONTROL BLOCX: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) i 0 1 8 l9 P lLICENSEE A l PCODE l B l S l 2 l@15 0l0 14 l- NVMSER LICENSE l0 l0 l0 l0 l0 l0 l 0l 0l@l 25 26 LICENSE TvrE4 lJO1l ll$71l l

CAT1l@l

$8 CON'T 0 "'

i 1

8 OuRC "lL 60

}@l061 l 5 l0 l- l0 12 17 17 @l COCKET NUMBER 68 0 69l 9 l 0 l 8 l 7 l 8 }@l 075 ] 9 REPORT EVENT CATE F4 l 2 l 2CATE l 7 l 880l@

O 2 EVENT l RWCU DESCRIPTION inboard isolation AND valve PROBABLE

( D-12-15 CONSEQUENCES h )-unconfirmed accelera I o 3 l DBE in excess of valve's certification. Subsequent evaluation using more l o 4 l accurate physical parameters and higher valve capability (as certified l c s l by manufacturer) show valve capable of performing design function as l 0 6 I installed. Unit 2 calculation'however,showed , 1 point on piping outboard 1 Ot7 I of m-12-15(thus isolable from reactor)to have a stress during the DBE I O a I above code allowable. I 7 8 9 80 E ODE SUSC E COMPONENT CODE SUB DE S E 7

O 9 8

lC lG l h d h lA l@ V l A lL lV lE lX l@ lE l@ D l@

9 10 11 12 13 18 19 20

. SEQUENTIAL OCCURRENCE REPORT REVISION LE R/Ro EVENT YE AR REPORT NO. CODE TYPE N O.

@ yu Rf l7l8l 21 22 l-l 23 l 013 l 8 l 24 26 l/l 27 011 l 23 29 lT l 30 l-l 31 W

32 K N AC ON ON P T ME HOURS S8 i O FOR 8. SUPPL ER MANUFACTURER lXI@lFl@

33 M

[.Z_J@

35 lZl@

36 l010l0l0l 37 40 W@

41 l42N l@ lA 43 l@ 44 Wl0l3 O47 l@

CAUSE DESCRIPTION AND COHRECTIVE ACTIONS i O, I Walworth 6" mark No.N14M3 gate valve-unconfi med excess acceleration of I i i t MO-12-15 proved in error via subsequent calculation and valve certifica-i e i tion. Unit 2 calculated DBE pipe stresses in excess of code will be re-

, 3 l duced to within allowable by addition of restraint prior to returning l 3 4 l the Unit to power. I 7 8 9 80 STA  % POWER OTHER STATUS O SCOV RY OISCOVERY DESCRl* TION i 5 NA lDlgl Notification from A.E.

lE l@ l 0 l 9 l 0 l@l l l A IVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTivtTY LOCATION OF RELEASE 7

1 6 89_

[J.j@lZl@l to 11 NA 44 l l 45 NA 80 l

PERSONNEL EXPOSURES NUMBEH TY8E DESCRIPTION i

l 0 l 0 l 0 l@l Z l@l NA l PERSONNE L INJURIES NuveER DESCRIPTION @

7 i a 8 9 l0l0{0l@l 11 12 NA 80 l

75'E ' " ESC'"'?T O~ " @ 7 9 0 6 0 4 0 3(oK 2236 138 7

i 9 8 9 IZl@liQ NA B0

' 4 NRC USE ONLY oESCRiPTiON@ //) /

2 o lN iSSUEfhl NA 7 //A V'/!/ %y l llllllllll ll lI 7 8 9 10 // g 68 69 80 %

M. E. Cooney _ , , , . . (215) 841-5020 2