Core Spray

Question 1

What is the initiation signal for core spray?

Answer 1

LOCA

LL3 OR RPV <410# DW >1.7#

Question 2

When does the core spray min flow valve (F031) open and close?

Answer 2

Normally open

Open when pump breaker closed and <500gpm

Close when pump breaker closed and >1500gpm

if manually positioned while pump breaker closed will return to position dictacted by flow rate

Question 3

At what RPV pressure is core spray able to inject?

Answer 3

300psi

Question 4

WHen does the Core spray injection valve (F005) open?

Answer 4

RPV pressur <410psi

Question 5

What is the difference between an auto start and a test start for core spray room coolers?

Answer 5

Auto _ start off pump breaker closure - fan starts and SW supply opens

Test - fan start but no service water

Question 6

What will trip a core spray pump?

Answer 6

Electrical only.

overcurrent UV

Question 7

What is the inboard core spray injection valve normal alignment and when does it auto and manually reposition?

Answer 7

Normally closed

Can be manually opened if RPV pressure <410psi or Outboard injection valve is full closed

Auto opens on a core spray initiation (after STR timer) when RPV pressure <410psi

Question 8

What is the outboard core spray injection valve normal alignment and when does it auto and manually reposition?

Answer 8

Normally open

If closed, can only manually open if the inboard F005 is closed

Receives open signal on CS initiation (after STR timer) and cannot be closed with a CS signal present