05000305/LER-1982-013

LER 82-013/01T-0:on 820528,preliminary Analysis of Piping Load Evaluation Per NUREG-0737,Item II.D.1 Indicated Allowable Stresses Will Be Exceeded on Pressurizer Safety Loop Seal Piping When Safety Valve Opens.Analysis Underway

ML20054F779
Person / Time
Site:	Kewaunee
Issue date:	06/11/1982
From:	Bernhoft S WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20054F765	List: 05000305/LER-1982-010, Forwards Updated LER 82-010/03X-1 & LERs 82-012/03L-0 & 82-013/01T-0 05000305/LER-1982-012 05000305/LER-1982-013
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM LER-82-013-01T, LER-82-13-1T, NUDOCS 8206170314
Download: ML20054F779 (1)

LER-2082-013,

Event date:
Report date:
3052082013R00 - NRC Website

text

'"

LICENSEE EVENT REPORT l

'com ROL stock: l l l l l l lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) o l 18 l'sl V l Litttst!

I l KCOIJEl N l " l 114 l@l IS 0 l 0 I - l 0 LICE!EEl 0 l 0NIHiUL l 0 Hl 0 l - l 0 l O22 l@l?te 4 l LICE;?,E 1 l 1'l TYPEl l 1JOl@lbi l CAI b8 l@

" ON' T

'olil [{fy l L l@l 0] 5 l 0 l 0 l 0 l 3 l 0 l 5 lh)l 0 l 5 l 2 l 81812 l@l 016 l I l 11812nul@)

It 60 Li DO(.K ET NU' ALE f t 'E we EVENT DATE #4 6 , HLPotti DAI E EVENT DFSCRIPTION AND PROBABLE CONSEQUENCES h fol2l l Preliminary analysis of piping load evaluation done in accordance with NUREG-0737, Iteml

,oi3; lII.D.1, indicates that allowable stresses will be exceeded on the pressurizer safety l

3 g , ; ;1aop seal piping when a safety valve opens. This event occurs as a result of assuming l

,ogsg lthe cold loop seal water clears the safety valve in an overpressure transient and the l f o I r> l l valve lifts with stsam to accelerate the slug of water through the downstream piping. l

, o g ,; g This event is reportable per Technical Specification 6.9.2.a.9.

• l 1 .

0181 i I 8 9 _

80 -

b'a s se CAutE CAUSE.. CO*/ P VA(yg CODE CODE SU9 CODE COf tPONENT CODE SUBCODE SUBCOOE i3Tsl g

IC is l@ U@ l Al@ lP lIlP lE lX lX lh l Cjh W h 9 10 li 12 33 18 13 20

,,,, SEQUENTIAL OCCU R R E '.CE REFCRT PEVISION LER RC, EVENT YE AR .. REPCRT NO. CODE TYPE NO.

@ ,ay.g,1

_ 78 18l21 22 1-1 23 1011131 74 26 Ld 27 10 11 l 28 29 1Tl 30 I-l 31 lol 32 A Er ACT O PL T .T4 HOURS S s,i F r r i d. b. 5 LIE  !.1A ACT* ER lZ 33 l@l34 Fl@ W@ Wh 35 36

• l0l0l0l0l 3/ 40

(_N_l 41

@ lN lh lN l@

42 43

!X 44 l9 19 l9 47l(E CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i l o l lThe analysis conservativelv assumes that the pressurizer safety loon seal tennerature I tilillis at 120'F and a cold slug of water is passed throueh the safety valve. Mensure-ontn I

, g7; lat power show the temperature in the pressurizer vault in excess of 150*F and could I g,;3, lpossibly change the results of the analysis. Final analysis *and recommendations are l g.,g,j lnot Complete and an update report will be submitted. I 7 8 3 8o STA 5 . POWER OTHER STATUS Ol5CO RY DISCOVERY CESCRiP TION

{1 l 58 9l l E lh l 100 l 7 l 0 lhl NA l l D lhl Report from Con 1ultant Perferninc Studv I 7 12 13 44 45 46 80 ACTivlTY CON T ENT RELE ASED OF RELE ASE AMOUNT OF ACTivlTY

• LOC ATION OF RE LE ASE.

[ t lEl [2_j h (_7.jh! NA l l NA 1 7 8 9 10 . 11 44 45 e0 PERSONNEL E XPOSURES Ntive E R TYPE DESCR'PTION li 171 101010 l@[Z_]@l NA I 8 9 PE RSO*4NE L INJUHIE S NUYMER DESCRIPfloN is 8 9 101010 t1l@l 1.*

NA I Bo L OS$ 0F Of t DAU AGE To F AClllTY YTPE P! SC H;f'ilON l i l u l Lz_J@!to N^ l a 9 8206170314 820611 8

't>"L'C " Y UEsCRiP riON PDR ADOCK 05000305 .

NRC USE ONLY issui S PDR  %

li j n l btj l a l 1111111111111:

7 n 9 to G8 69 80 L Nwc or rntPAntn < - T e r n hort pooNE.(414) 388-2500 Ext. 352  ?