PWRプラントにおけるスケール付着事象

1 THE KANSAI ELECTRIC POWER CO., 25 6 27 22 THE KANSAI ELECTRIC POWER CO., INC. 1 SG2 33 THE KANSAI ELECTRIC POWER CO., INC. SGR SGR SGR SGR SGR SGR SGR Zn Zn Zn Zn Zn Zn Zn Zn Zn Zn1980 1990 2000 2010 1970 4 3 4 3 1 2 3 1 2 1 2 pH ( )Modified pH (Li< )Modified pH (Li< ) 44 THE KANSAI ELECTRIC POWER CO.

2 , 2 3 (NiFe2O4) NiFe2 O4 ,Fe3 O4 FeCr2 O4 Terachi et al., Nuclear Science and Technology , 10(2008) TEM (316SS PWR 340 55 THE KANSAI ELECTRIC POWER CO., 0204060801001201400102030 SG Hot,Cold) (mSv/h)11 SG 66 THE KANSAI ELECTRIC POWER CO., 7 PWR SGR020406080100120140-20-1001020 SGR SG (mSv/h)SGR 77 THE KANSAI ELECTRIC POWER CO.

3 , INC. Ni Co58 Co Co60 SGR 600 690 Cr Ni pH SG, Ni,Co Ni58 Co58Co59 Co60 Co58/Co60 Ni 88 THE KANSAI ELECTRIC POWER CO., Co58/Co60 TT600 TT690 Co58 Ni Co58 SG Ni Ni58 Co58 Co60 SG Co58/Co60 TT600TT6900510152025300102030SG Co58/Co60 TT600TT690 Co60 , Co58 71 99 THE KANSAI ELECTRIC POWER CO.

4 , 7 PWR Ni Co58 Ni Co58 Ni Co58 Co58 Co60 SGR SGR020406080100120140-20-1001020SG (mSv/h)SG Co60 ( )Co58 ( ) 1010 THE KANSAI ELECTRIC POWER CO., INC. ( 10 ) EPRI Co60 Zn SG r (Zn ) -4 -3 -2 -1 0 1 2 3 4 5 5 3ppb Zn D. Perkins et al., NPC, 2008, Berlin Co60 ( 15 )EPRI (5ppb,1 13 ) 1 2 3 4 5 Zn 1111 THE KANSAI ELECTRIC POWER CO.

5 , SG SG Ni (Co58) ( ) SGR Co (5 ) Co60 1212 THE KANSAI ELECTRIC POWER CO., SG2 SG FAC(2 ) 1313 THE KANSAI ELECTRIC POWER CO., INC. SG pH BEC ASCA MHI 1414 THE KANSAI ELECTRIC POWER CO.

6 , - ETA3ppm) ) > H9,8) ETA 70 80 90 2000 1 2 1 2 3 1 2 3 4 3 4 AVT ETAETA ETA SG 1515 THE KANSAI ELECTRIC POWER CO., PWR 11 ) AVT ETA pH 11010010001982 1987 1993 1998 2004 2009 2014 (kg) )AVTETA pH ( ) 1616 THE KANSAI ELECTRIC POWER CO.

7 , INC. pH (SGR 11 ) pH ( ) pH pH pH(25 C) (ppb)AVTETA pH 1717 THE KANSAI ELECTRIC POWER CO., INC. pH pH (ppb) pH (ppb)EPRI Beznau NPP Fruzzetti et. al., NPC2012 Mailand et. al., NPC2012 (Beznau NPP) pH 2 1ppb( 1ppb) BeznauKepcoKepco1818 THE KANSAI ELECTRIC POWER CO., pH pH pH ( ) ETA MSH PWR2 ETA ) pH ETA 1919 THE KANSAI ELECTRIC POWER CO.

8 , SG SG FAC 2 ETA pH ,SG 2 1ppb