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Regional Basic Professional Training Course in Korea

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Table 8.8‐2 SBLOCA Break Spectrum Analysis for KSNP<br />

❙ 543 ❙<br />

8-B. Determ<strong>in</strong>istic Accident Analysis (LOCA)<br />

Break Size/<br />

Location<br />

Peak Clad Temperature* Max. Oxidization** Hydrogen at<br />

Hottest Rod,<br />

(ft %***<br />

2 /cm 2 ) ℉(℃) Elevation ft (m) % Elevation ft (m)<br />

0.50 (465)/PD 1,187 (642) 11.25 (3.43) 0.0157 11.25 (3.43) < 0.0023<br />

0.35 (325)/PD 986 (530) 11.25 (3.43) 0.0025 11.25 (3.43) < 0.0004<br />

0.20 (186)/PD 1,020 (549) 10.625 (3.24) 0.0021 11.25 (3.43) < 0.0003<br />

0.05 (46.5)/PD 1,033 (556) 10.625 (3.24) 0.0007 11.25 (3.43) < 0.0002<br />

0.02 (18.6)/PD 1,042 (561) 11.25 (3.43) 0.0010 11.25 (3.43) < 0.0003<br />

0.03 (27.9)/HL 1,029 (554) 10.625 (3.24) 0.0008 11.25 (3.43) < 0.0002<br />

* Acceptance Criteria: *2,200℉, ** 17%, *** 1.0%.<br />

Figures 8.8‐10 to 8.8‐12 show behaviors of RCS pressure, core level, and cladd<strong>in</strong>g<br />

temperature for 0.5 ft 2 pump discharge pipe break, respectively. Fig. 8.8‐13 shows a break<br />

spectrum analysis result.<br />

INNER VESSEL PRESSURE, psia<br />

2400<br />

2000<br />

1600<br />

1200<br />

800<br />

400<br />

0<br />

0<br />

0 40 80 120 160 200<br />

TIME, seconds<br />

Figure 8.8‐10 RCS Pressure of 0.5 ft 2 (PD) Break<br />

168.72<br />

160<br />

140<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

INNER VESSEL PRESSURE, kg/cm 2<br />

A

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