Loss of IA

Question 1

What are entry conditions for Loss of IA?

Answer 1

Question 2

When will unit 1 terminate cross connect with Unit 2?

Answer 2

U1 IA header pressure < 60 psig.

Question 3

What actions are taken if IA reaches 60# and lowering?

Answer 3

Commence plant shutdown at CRS directed rate, CV-1206 in override, if PZR level not maintained > 100” open HPI block.

Question 4

What actions are taken if IA pressure reaches 35 psig and lowering?

Answer 4

Trip the reactor, actuate MSLI and EFW and isolate L/D.

Question 5

How do makeup and purification valves fail?

Answer 5

CV-1222 - as is

CV-1235 - as is

CV-1207 - open

Di inlets and MU filter inlets - closed

Question 6

What position do FW and Steam valves fail (SU,LL,TBV,ADV)?

Answer 6

SU valves - as is

LL Valves - as is

TBVs/ADVs - Closed, but steam pressure will force valves open

Question 7

What position do ICW Discharge/suction cross connects fail?

Answer 7

Closed

Question 8

What actions are taken if PZR level reaches 290”?

Answer 8

Close CV-1206, Makeup Blocks, Secure OP HPI pump if ICW available to seal coolers

If ICW not available, then prior to reaching 290” trip rx, actuate EFW, close CV-1206, trip RCPs and bottle up seals