IP 71152S, Semiannual Trend Review
IP 71152S represents the Semiannual Trend Review portion of IP 71152
- See main: IP 71152. "S" guidance in section 03.02
Sample size = 2
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03.02 Semiannual Trend Review
Review licensee PI&R program documents (e.g., issue tracking databases, licensee audits, and self-assessments) to identify potential trends (either NRC- or licensee-identified) that might indicate the existence of a more significant safety issue.
Specific Guidance:
The scope of this review should include repetitive or closely-related issues that may have been documented by the licensee outside the normal corrective action program (CAP), such as: trend reports, metrics, performance indicators, major equipment problem lists, repetitive or rework maintenance lists, departmental problem or challenge lists, issues that challenge operators in performing duties (e.g., workarounds), system health reports, quality assurance audit or surveillance reports, self-assessment reports, maintenance rule assessments, or corrective action backlog lists. [C1]
Consider a review of PI&R documents which have been dispositioned to identify potential adverse trends in SSCs as evidenced by acceptance of long-standing non-conforming or degraded conditions. Such indicators could include “use-as-is” determinations, revision of engineering or operational acceptance criteria, reductions in design or operational margin, and repetitive work orders. Review the selected sample against the success criteria in section 03.04.
Inspectors could also perform a review of findings or events over a period of time for indications of common causes. Inspectors should be careful not to aggregate findings during this review, but to focus on whether findings or events exhibit similar causes and if those causes constitute a separate concern. Inspectors should consider emerging or existing cross-cutting themes during the semiannual trend review to develop insights into the licensee’s progress in addressing the themes. Inspectors can perform this review by summarizing the results of the licensee’s reviews and comparing those results to those identified by the NRC through the baseline or supplemental inspection program, including issues identified as a result of the routine PI&R review in IMC 2515, Appendix D, “Plant Status.” This information could be incorporated into the assessment under section 03.04. [C1]
Inspectors should document an inspection observation, in accordance with IMC 0611, when a potential adverse trend that might indicate the existence of a more significant safety issue is identified. Observations should include how the potential adverse trend relates to the success criteria in section 03.04 and any licensee actions in response. The level of documentation for the trend review may include trends that do not rise to the level of an inspection finding.
Additional issues of concern identified during the semiannual trend may be deferred to an annual sample or the biennial team inspection.