3.5 eccs

Question 1

3.5.1 accumulators

What is the basis for the upper limit on accumulator pressure?

Answer 1

• provides margin to prevent inadvertant relief valve actuation

Question 2

3.5.5 Seal injection flow

What is the limit on seal injection flow?

Why is this parameter limited?

What system does this T.S. Ensure remains operable?

Answer 2

• Seal injection flow resistance >/= 0.2117 ft/gpm ²
• During a LOCA it ensures adequate charging injection is maintained (not too much flow to seals)
• ECCS operability is protected