SAN ONOFRE: FAR OUTSIDE THE NORM February 7, 2013 Dan Hirsch, - PowerPoint PPT Presentation

SAN ONOFRE: FAR OUTSIDE THE NORM February 7, 2013 Dan Hirsch, Lecturer, UC Santa Cruz; President, Committee to Bridge the Gap

Note: The views presented here are those of the author and do not necessarily represent those of UCSC or CBG.

EDISON MA EDISON MAKES KES TW TWO C O CLAIMS LAIMS TO O SUP SUPPOR PORT T ITS R ITS REQUES EQUEST T FOR FOR REST RESTAR ARTING UN TING UNIT 2 IT 2.

FIRST: “ The wear in Unit 2 is far less extensive than the wear in Unit 3 ” and “Unit 3 had more than 300 tubes with the unexpected tube-to-tube wear; Unit 2 only had two tubes exhibiting minor tube-to-tube wear.”

Second SCE Assertion: “ The he na natur ture of e of the the supp suppor ort t str structur ucture e wear is ear is not un not unusual usual in new steam in new steam gener generator tors s and and is is par part o t of the the equip equipment ment settling in.” Source: S. Cal. Edison Press Release, July 13, 2012

THE THE MEDIA MEDIAN N NU NUMBER MBER OF STEAM OF STEAM GENERA GENERATOR OR TUBES TUBES SHO SHOWING WING WEAR WEAR AFTER AFTER ON ONE E CY CYCLE CLE OF OF OPERA OPERATION TION NATION TIONALL ALLY Y IS IS — FOU FOUR. R.

SAN SAN ON ONOFRE OFRE UN UNIT 2 IT 2 HAD HAD 1595 1595 D DAMA AMAGED GED TUBES, TUBES, APPR APPROXIMA XIMATEL TELY Y 400 TIMES THE 400 TIMES THE MEDIA MEDIAN. N. SAN SAN ON ONOFRE OFRE UN UNIT IT 3 3 HAD HAD 1806. 1806.

THE THE MEDIA MEDIAN N NU NUMBER MBER OF WEAR OF WEAR INDICA INDICATIONS TIONS ON ON STEA STEAM M GEN GENERA ERATOR OR TUBES TUBES AFTER AFTER ON ONE E CY CYCLE CLE OF O OF OPERA PERATION TION IS IS — FOU FOUR. R.

SA SAN N ONOFRE UN ONOFRE UNIT 2 HAD IT 2 HAD 4721, GR 4721, GREA EATE TER R THAN THAN A A THOU THOUSAND SAND TIMES TIMES MORE. MORE. SAN SAN ONOFRE ONOFRE UNIT 3 HAD UNIT 3 HAD 10,284. 10,284.

THE THE MEDIAN MEDIAN NU NUMBER MBER OF OF STEA STEAM M GENERA GENERATOR OR TUBES TUBES THA THAT T WERE WERE PL PLUG UGGED GED AFTER AFTER ON ONE CY E CYCLE CLE OF O OF OPERA PERATION TION IS IS — ZER ZERO. . SAN SAN ON ONOFRE OFRE UN UNIT 2 H IT 2 HAD AD 510; 510; UN UNIT 3 H IT 3 HAD AD 807 807.

SCE’s CAL Response States: “The actions to operate at reduced power and shut down for a mid-cycle inspection within 150 cumulative days of operation are interim compensatory actions .

“SCE will reevaluate these actions during the mid-cycle inspection based on the data obtained during the inspections.

“ In addition, SCE has established a project team to develop and implement a long term plan for repairing the SGs .” (emphasis added)

Conclusion It would be unwise to permit restart of San Onofre Unit 2 with its crippled steam generators that need repair or replacement without in fact repairing or replacing them.