Applying UPC Scaling-Up Methodology to the LSTF-PKL Counterpart Test

Table 2

Test 3 test conditions.

Event	Condition	High-pressure phase	Conditioning phase	Low-pressure phase
Break valve opened	𝑡 = 0 s	*
Low-pressure scram signal	𝑃prim < 12.96 MPa	*
Secondary system isolation	Scram signal	*
Initiation of primary coolant pump coastdown	Scram signal	*
Initiation of core power decay curve simulation	Scram signal	*
Initiation of HPI coolant injection into pressure vessel upper plenum	𝑇PCT > 750 K	*
Break valve closed	𝑃prim < 5 MPa	*	*
Power constant	𝑃prim < 5 MPa		*
Termination of HPI coolant injection into pressure vessel upper plenum	𝐻HL ≅ 12 · 𝐻		*
SG’s relief valve depressurization	𝐻HL ≅ 12 · 𝐻HL		*
Secondary system isolation	𝑃prim < 3.9 MPa		*
Break valve reopened	𝑃prim > 4.5 MPa		*	*
SG depressurization as AM action	𝑇CET > 623 K			*
Initiation of AFW in both loops	AM action signal			*
Initiation of ACC system in both loops	𝑃prim < 2.6 MPa			*
Termination of ACC system in both loops	𝑃prim < 1.2 MPa			*
Initiation of LPI system in both loops	𝑃prim < 1 MPa			*