Daily Load-Follow Operation in LEU+-Loaded APR1400 Using Mode-K+ Control Logic

Table 4

Mode-K+ CEA selection control logic [24].

Condition			Selected CEA
Stage flag	CEA direction	CEA position
	Insertion	,	P3
		, ,	P2
		, , ,	P1
		, , , ,	R5+
	Withdrawal	,	R5+
		( or ), ,	P1
		( or ), ( or ),	P2
		( or ), (WP1 = T or WP1 < = H/2), (WP2 = T or WP2 < = H/2), WP3 > = H/2	P3
	Insertion	W P3 > H/2	P3
		W P3 < = H/2, WP2 > H/2	P2
		, ,	P1
		, , ,	R5+
	Withdrawal	,	R5+
		( or ),	P1
		( or ), ( or ),	P2
		( or ), ( or ), ( or ),	P3