OECD/NRC PSBT Benchmark: Investigating the CATHARE2 Capability to Predict Void Fraction in PWR Fuel Bundle

Table 2

Summary of subchannels results by CATHARE2 code.

Void fraction	TS 1			TS 2			TS 3			TS 4			Overall
	⟨𝜀[𝛼]⟩	𝜎[𝜀]	Number	⟨𝜀[𝛼]⟩	𝜎[𝜀]	Number	⟨𝜀[𝛼]⟩	𝜎[𝜀]	Number	⟨𝜀[𝛼]⟩	𝜎[𝜀]	Number	⟨𝜀[𝛼]⟩	𝜎[𝜀]	Number
0.0–0.05	0.005	0.0161	6	0.015	0.0092	5	0.013	0.0152	8	−0.004	0.0088	4	0.007	0.0143	23
0.05–0.10	−0.012	0.0244	9	−0.012	0.0264	6	—	—	—	−0.040	0.0132	4	−0.021	0.0251	19
0.10–0.15	−0.042	—	1	−0.040	0.0262	3	−0.002	0.0455	3	—	—	—	−0.028	0.0365	7
0.15–0.20	−0.023	0.0037	3	−0.079	0.0080	4	—	—	—	−0.091	0.0087	2	−0.064	0.0313	9
0.20–0.30	−0.081	0.0384	3	−0.030	0.0533	5	−0.102	—	1	−0.095	0.0200	3	−0.077	0.0485	12
0.30–0.40	−0.038	0.0574	8	−0.057	0.0490	5	−0.043	0.0496	2	−0.056	0.0080	2	−0.048	0.0477	17
0.40–0.60	−0.032	0.0757	7	−0.009	0.0520	10	−0.072	0.0759	4	−0.068	0.0143	3	−0.045	0.0633	24
0.60–0.80	0.007	0.0235	6	0.053	0.0267	5	—	—	—	−0.058	0.0021	2	0.000	0.0446	13
0.80–1.00	—	—	—	—	—	—	−0.107	0.0429	2	—	—	—	−0.107	0.0429	2