ML040980143

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Meeting Slides - Summary of Conference Calls with Southern California Edison Co Regarding 2004 Steam Generators Tube Inspections for San Onofre Nuclear Station (Songs), Unit 2 (Tac. MC2302)
ML040980143
Person / Time
Site: San Onofre Southern California Edison icon.png
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

Mar 9 '04 10:19 P.01 NUCLEAR REG AFFAIRS Fax :949-368-7575 Jndusfty H~istory of ObstructedSleeves in loss KORI ¶ fgjlbun14 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

  • Obstructed Slaevo L~su&s

- Parent Tuba rierecd

  • Bu1Zed Sleolmm. Iim-it ECT probea8

- E.xpamilon transizion zone

  • Bulged sleeves may tnrfado P&Mary flow

- LoyAer rZ2Od Joint zone - Snmll number of obtxsrce sleevts mnintoIlees effect. (lo out of 39a eafarng

  • Slecve mrube Weld sleeves orabout 2.5%)

- L-c* of fusion SLV~ctural and lealmlge irtari-'

  • Sleeve to Tube Relied Joint - No Primary to saoindarf leakage lost cycle.
  • sleeve material - 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 Mar 9 '04 10:20 P.02 NUCLERR REG RFFRIRS Actions Taken

  • Data ftom eviu3 sleeving campaigns ruviewe

- No =aGem to affected sleeves

- UT dama shlows co=pea weld fusion

,L

- Toerue trsas dat shows norinal values

  • P edure review condurced I. - No process changes between SONGS campaigns

- No cbvious reasons for the 10 sleeve bulges A -.

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

-X,* 4 situation and ro-reviewed V* critical pfocess smeps, e o. cleaning and roll paraneters 2