ML24011A211
| ML24011A211 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 12/14/2023 |
| From: | Constellation Energy Generation |
| To: | Thomas Setzer NRC/RGN-I/DORS/OB |
| References | |
| Download: ML24011A211 (1) | |
Text
2023LimerickILTNRCPostExaminationChallenges Limerick training staff conducted a post-exam review and analysis per NUREG-1021, section ES-4.3. Our review determined there are three questions, 2 RO and 1 SRO, that contained flaws that impacted the fair and equitable outcome of the exam. We are therefore submitting these questions for your review per the guidance in NUREG-1021, section ES-4.4.
The table below summarizes the questions, basis for change, and affected applicants.
Question Basis Number of Affected Applicants 17 Unclear question stem 1 of 2 RO 4 of 8 SRO 46 Unclear question stem 0 of 2 RO 4 of 8 SRO 92 Newly discovered technical information 2 of 8 SRO In accordance with ES-4.3, Section C.4, the following pages provide the analyses, justification for change, and our recommended disposition for each of these questions.
We present each of these questions in the following format:
The original question as approved by the NRC and administered to the applicants.
The justification for change, including an Analysis, Conclusions, and the Recommendation.
A copy of the reference documentation that supports the recommended change.
2023LimerickILTNRCPostExaminationChallenges Applicant Comments:
- 1) In simulator scenarios we observed with LORT, the STA routinely assisted the CRS with Critical Parameter identification/tracking.
- 2) When I read the procedure (OP-LG-103-102-1002), I remember reading about the STA tracking critical parameters and giving estimated times.
Discussion:
There is additional technical information identified in the reference procedure that supports a change to the answer key. A is correct as identified in the answer explanation and is not in dispute. Analysis indicates B is also correct. While assignment of critical parameters is the responsibility of the Unit Supervisor/CRS, answer B does not state the STA determines critical parameters to be assigned but that the STA ensure identification of critical parameters. OP-LG-103-102-1002 has guidance that supports that answer choice.
OP-LG-103-102-1002, Strategies For Successful Transient Mitigation discusses the following:
Step 5.3 OP-LG-103-102-1002 Appendix 1, "STA-IA Guide Sheet" has been created as a guide to aid the STA/IA in maintaining focus on the key aspects of a transient. OP-LG-103-102-1002 Appendix 1 or any equivalent tool may be used by the STA/IA to ensure roles and responsibilities of this unique crew position are consistently met. The purpose of the guide sheet is to provide the STA/IA with a format to log the status of events, the status of equipment malfunctions, to trigger thoughts about key strategic operational strategies, and to identify critical parameters for trending.
OP-AA-103-102, Watch-Standing Practices is referenced in the answer explanation for B and D. However, the reference to OP-AA-103-102 in answer explanation B and D is a typo and should read OP-LG-103-102-1002. Additionally, the applicants answer response is based on the procedure in the question interrogative.
Furthermore, OP-AA-103-102 includes guidance that does not conflict with OP-LG-103-102-1002:
Step 4.3.3. Transient Critical Parameters
- 1. When mitigating a transient, it is necessary for the Main Control Room Team to IDENTIFY the critical parameters necessary for control. Once these are identified, the Main Control Room Team should establish a band/milestone within which the critical parameter should be controlled.
The Unit Supervisor owns the responsibility to ensure this occurs.
While the Unit CRS owns the responsibility, the entire Main Control Room Team (Including the STA) is responsible for identifying the critical parameters necessary for control. This is emphasized by the procedure referenced in the stem of the question (OP-LG-103-102-1002 Step 5.3). The responsibilities of the STA outlined in OP-LG-103-102-1002 are based on the INPO 90-003 and ACAD 14-002, Guidelines for the Training and Qualification of Shift Technical Advisors. Ensuring the identification of critical parameters is a fundamental requirement of the STA role and one of the bases for its creation.
List of References L-S-32, Sheet 0000, Rev 9, Standby Gas Treatment System OP-AA-103-102, Rev 21, Watch Standing Practices OP-LG-103-102-1002, Appendix 1, Rev 1, STA-IA Guide Sheet OP-LG-103-102-1002, Rev 38, Strategies for Successful Transient Mitigation Simulator Plots in support of question 17