| Before/After | Standard Incidence Ratio (n) | ||
Nuclear Plant | Plant Startup | Before Start | After Start | Change |
Haddam Neck CT Millstone CT Duane Arnold IA Ft. Calhoun IA TOTAL | 1950-67 1968-84 1950-70 1971-84 1969-74 1975-84 1969-73 1974-84
| 0.94 (36) 0.69 (64) 0.92 (23) 0.52 (1) 0.785 (124) | 1.03 (76) 0.79 (90) 1.13 (77) 0.92 (6) 0.950 (249) | +9 +10 +21 +40 +16.5 p < 0.05 |