SALEM
SALEM STUDY SYSTEM
Exams > 2020 Q15 — Loss of Control Air ECAC Actions

2020 Q15 — Loss of Control Air ECAC Actions

⚠️ DRAFT
Q15 — Loss of Control Air ECAC Actions 000065AA1.04 (3.5)
Given:

• Unit 2 is at 100% Power.
• The crew recognizes degrading Control Air Header pressures.
• The CRS enters S2.OP-AB.CA-0001, Loss of Control Air.
• 2A Control Air Header pressure is 93 psig.
• 2B Control Air Header pressure is 88 psig.

Note: ECAC = Emergency Control Air Compressor

In accordance with S2.OP-AB.CA-0001, what action is required, and if control air (CA) header pressure continues to LOWER, what subsequent action will be required?
A. Start #2 ECAC and if BOTH CA headers lowers to < 80 psig then Trip the Reactor.
B. Notify Unit 1 to start #1 ECAC and if EITHER CA headers lowers to < 80 psig then Trip the Reactor.
C. Start #2 ECAC and if EITHER CA headers lowers to < 80 psig then Trip the Reactor.
D. Notify Unit 1 to start #1 ECAC and if BOTH CA headers lowers to < 80 psig then Trip the Reactor.
▶ Show Answer & Explanation
✗ A. Incorrect. Plausible because the candidate may believe that #1 ECAC feeds the 2A header and that #2 ECAC feeds to 2B header. Incorrect because #2 ECAC senses CA header A and #1 ECAC senses CA header B. 2A header is presently 93 psig and does not require starting per the abnormal procedure. The second part is correct IAW the CAS of S2.OP-AB.CA-0001(Q), Loss of Control Air.
✗ B. Incorrect. Plausible because the first part is correct, S2.OP-AB.CA-0001(Q) states if 2B Control Air Header is ≤ 88 psig, then notify Unit 1 NCO to start #1 ECAC. The second part is plausible because the candidate may believe that the procedure CAS is performed if either header pressure lowers to < 80 psig.
✗ C. Incorrect. The first part is plausible because the candidate may believe that #1 ECAC feeds the 2A header and that #2 ECAC feeds to 2B header. Incorrect because #2 ECAC senses CA header A and #1 ECAC senses CA header B. 2A header is presently 93 psig and does not require starting per the abnormal procedure. The second part is plausible because the candidate may believe that the procedure CAS is performed if either header pressure lowers to < 80 psig.
✓ D. Correct. S2.OP-AB.CA-0001(Q) states if 2B Control Air Header is ≤ 88 psig, then notify Unit 1 NCO to start #1 ECAC. The second part is correct IAW the CAS of S2.OP-AB.CA-0001(Q), Loss of Control Air.
Ref: S2.OP-AB.CA-0001(Q), Loss of Control Air and Bases | LO: N/A | Source: Modified Bank - Salem 16-01 NRC Exam - Q61 | Cognitive: Fundamental/Memory

Connections