Q87 — NRC Reporting Manual Trip & SI
012 G2.4.30 (4.1) SRO
Given:
• In accordance with the outage schedule, the Unit 2 reactor was manually tripped at 20% power for the start of a planned refueling outage.
• Following the reactor trip, the crew observes RCS pressure dropping rapidly and manually actuates Safety Injection.
• All other systems responded as designed post trip.
Based on the above events, which ONE of the following correctly identifies the reportability to the NRC?
[REFERENCE PROVIDED]
• In accordance with the outage schedule, the Unit 2 reactor was manually tripped at 20% power for the start of a planned refueling outage.
• Following the reactor trip, the crew observes RCS pressure dropping rapidly and manually actuates Safety Injection.
• All other systems responded as designed post trip.
Based on the above events, which ONE of the following correctly identifies the reportability to the NRC?
[REFERENCE PROVIDED]
A. Nonreportable.
B. 4 hour report under RAL#s 11.3.1 AND 11.3.2.
C. 4 hour report under RAL# 11.3.2 ONLY.
D. 4 hour report under RAL# 11.3.1 ONLY.
▶ Show Answer & Explanation
✓ D. Correct. IAW SECG RAL# 11.3.2, since the manual reactor trip was part of a preplanned event, then a 4 hour report to the NRC is not required. However, since the crew was required to manually actuate Safety Injection due to degrading RCS conditions, this would be reportable to the NRC as a 4 hour report under SECG RAL# 11.3.1, since this was not part of a series of preplanned events during testing or reactor operation.
✗ A. Incorrect. Plausible because the SRO may misinterpret the reportability requirements for a valid actuation such that if the reactor trip and Safety Injection were not due to automatic actuation signals, then, no report is required to the NRC.
✗ B. Incorrect. Plausible because the SRO may believe that if at anytime the reactor is tripped regardless of preplanned or not, then a 4 hour report is required under RAL# 11.3.2. The SRO may misinterpret the 4 hour report criteria under RAL# 11.3.1 based on the Safety Injection being manually actuated.
✗ C. Incorrect. Plausible because the SRO may believe that since an SI was manually actuated that this manual action did not meet the criteria of a valid actuation signal under RAL# 11.3.1 for a 4 hour report. The SRO may believe that the manual reactor trip is reportable under RAL# 11.3.2 even though it was preplanned.
Ref: SECG Section 11.3 | LO: NOS05TRP001-09, Objective 20 | Source: New | Cognitive: Comprehension/Analysis
Connections
- Related systems: RPS/SSPS, ECCS
- Related EOPs: EOP-TRIP-1 — Reactor Trip or Safety Injection
- Related exam: 2022 NRC Written Exam