ML040980143
| ML040980143 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/09/2004 |
| From: | Bo Pham NRC/NRR/DLPM/LPD4 |
| To: | Ray H Southern California Edison Co |
| pham b m, nrr dlpm lpdiv-2, 301-415-8450 | |
| Shared Package | |
| ML041130624 | List: |
| References | |
| TAC MC2302 | |
| Download: ML040980143 (2) | |
Text
NUCLEAR REG AFFAIRS Fax :949-368-7575 Mar 9 '04 10:19 P.
01 Jndusfty H~istory of Obstructed Sleeves in loss KORI ¶ fgjlbun 14 of 558 obStrUcted after I cirtl Trojan found 2 eic~sIvellwelded sleeves
,ob-shictde In 2001 feaver Valley fosrid 4 of 350 W~er to-wed le-eves obstructed afte I cycle Fwlay fund I of -1000 lservveldsed&eve Since the 'ealy 80s. -10 of 12,000 TIG welded sleeves h2V9 been found oebtrude (Girtna, Zion, Prairie Island)
SONGS,. 318semvs, 10 wrth bthr.cdons None of t1hece resulted In prmbary to secodry Possible Leak Paths
- Parent Tuba rierecd
- E.xpamilon transizion zone LoyAer rZ2Od Joint zone
- Slecve mrube Weld
- L-c* of fusion
- Sleeve to Tube Relied Joint
- sleeve material Obstructed Slaevo L~su&s
- Bu1Zed Sleolmm. Iim-it ECT probea8
- Bulged sleeves may tnrfado P&Mary flow
- Snmll number of obtxsrce sleevts mnintoIlees effect. (lo out of 39a eafarng sleeves orabout 2.5%)
SLV~ctural and lealmlge irtari-'
- No Primary to saoindarf leakage lost cycle.
- Qua~ificaotb of sleeve indude4 collaps testing (rOPIC-al RePO4 OEN-630-P, Rev 02)
Both wielded and rolled joint Mmrained lok tg,,ht a
1
Fax :949-368-7575 NUCLERR REG RFFRIRS Mar 9 '04 10:20 P.02
,L I.
A Actions Taken
- Data ftom eviu3 sleeving campaigns ruviewe
- No =aGem to affected sleeves
- UT dama shlows co=pea weld fusion
- Toerue trsas dat shows norinal values
- P edure review condurced
- No process changes between SONGS campaigns
- No cbvious reasons for the 10 sleeve bulges
-X,* 4 Actions Proceed with Slevirng In Urit 2
- Ver~ied that no-ube deteas eist in the rec jcint fne
- As diswssed we perforn visual lnepcion of tube In rall joint zone to characride surtam cand.Son, arnd modifed the procedure to capture the deenirg pros&
- Operators and inspectors were bdefad on situation and ro-reviewed V* critical pfocess smeps, e o. cleaning and roll paraneters 2