Research Article

ELSMOR European Project: Experimental Results on an Innovative Decay Heat Removal System Based on a Plate-Type Heat Exchanger

Table 2

List of events for tests ELSMOR_00099 and 00100.

Time (s)EventNotes

Test ELSMOR_00099_C
Initial filling ratio of the secondary side: 60.16% vacuum in the secondary side (SS) 0.5 barValve V1 on the PS HL is 7 turns open out of 9.5 turns (fully open)
73Triggering valve V3 openedStart-up (triggering valve opening). Vacuum conditions in the SS
74–299Natural circulation start-up and stabilisation
360–660Steady state at primary side (PS) T (TF_082) 309.6°C; FR 60.16%
700–1140PS temperature stabilisation around 310°C
978–10606.5 kg mass extracted from the SS; F.R. 55.04%
1140–1440Steady state at PS T 310.8°C; FR 55.04%
1550–16256.28 kg mass extracted from the SS; F.R. 50.00%
1900–2300Steady state at PS T 310.0°C; FR 50.00%
2860–29306.22 kg mass extracted from the SS; F.R. 45.04%
3070–3600Steady state at PS T 309.8 °C; FR 45.04%
3615–37086.30 kg mass extracted from the SS; F.R. 40.00%
3890–4350Steady state at PS T 309.7°C; FR 40.00%
4390–44706.35 kg mass extracted from the SS; F.R. 34.92%
4500–4900Steady state at PS T 310.0°C; FR 34.92%
5349–55026.05 kg mass extracted from the SS; F.R. 30.08%
5630–6400Steady state at PS T 309.9°C; FR 30.08%
6506–66006.4 kg mass extracted from the SS; F.R. 24.96%
6700–7000Steady state at PS T 309.9°C; FR 24.96%
7075Refilling of HX-Pool through V009 by opening FCV07
6275–73536.3 kg mass extracted from the SS; F.R. 19.92%

Test ELSMOR_00100_C
95Refilling stop of HX-Pool through V009 by closing FCV07
200–470Steady state at PS T 309.6°C; FR 19.92%
480–5153.1 kg mass extracted from the SS; F.R. 17.44%
700–1100Steady state at PS T 309.7°C; FR 17.44%
1184–12203.1 kg mass extracted from the SS; F.R. 14.96%Strong reduction of SS flowrate and circulation destabilisation
1740–2100Steady state at PS T 310.5°C; FR 14.96%Unstable
2140–21500.55 kg mass extracted from the SS; F.R. 14.52%
2225–2600Steady state at PS T 310.1°C; FR 14.52%Unstable
2622–26320.55 kg mass extracted from the SS; F.R. 14.08%
2790–3100Steady state at PS T 310.0°C; FR 14.08%Unstable
3150–32100.46 kg injected into the SS; F.R. 14.45%
3300–3600Steady state at PS T 310.1°C; FR 14.45%Unstable
3680–37400.46 kg injected into the SS; F.R. 14.82%
3890–4240Steady state at PS T 309.9°C; FR 14.82%Unstable
4250–43100.46 kg injected into the SS; F.R. 15.19%Unstable
4420–44800.46 kg injected into the SS; F.R. 15.56%Unstable
4678–47380.46 kg injected into the SS; F.R. 15.94%Unstable
4896–49560.46 kg injected into the SS; F.R. 16.31%Unstable
5150–52100.46 kg injected into the SS; F.R. 16.68%Unstable
5348–54080.46 kg injected into the SS; F.R. 17.05%Unstable
5523–55830.46 kg injected into the SS; F.R. 17.42%
5681–57410.46 kg injected into the SS; F.R. 17.79%
5896–59560.46 kg injected into the SS; F.R. 18.16%Re-stabilised
6550–6900Steady state at PS T 309.9°C; FR 18.16%
7340PS temperature reduction started to 260°C

Bold characters put in evidence the time intervals that identify the steady-state.