BWR []. 1. ...

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BWR [] 1. WOL IGSCC WOL 1 Original Butt WeldCracPipekStructural Weld OverlayWeld OverlayWeldOverlayWeld Overlay (a) (b) (c) R-7(d) 0.030 % (e) 2(f) 0 m/s (g)6.915.8 kJ/cm150 0.75Rtp13mm 13mmHAZHAZ0.75RtpLwtwtPRr()WOL tn ()R tp twWOL FN7.5 FN5.0 () ()tn FN7.5 FN5.0 WOL (a) 100A700A(b) 14.046.0mm(c) P-8(d) A-7(e) (f) 13mm,7mm13mm13mm7mmWOL2. WOL 1 2 3. 2 4. 4.1WOL 3 (1)WOL WOL (a)360 (b) WOL 75tw tp/3 (c)Sm (d) WOL (e)WOL FN FN7.5 FN5.0 FN7.5 FN5.0 WOLWOL FN7.5 WOL (2)WOL WOL (a) HAZ 0.75Rtp (b)UT (3) 1 1 WOL 2 2 (a)30 3045 (b)t2 4.2WOL WOL FN7.5 FN5.0 1 5. (1)WOL 4 PT UT (2) 5 UT 4 WOL13mm13mm13mm13mmUTtp25%tpWOLUT10mm 3 WOL U 4 U 5