27th Annual Report, Preface

This report covers the activities of the Diablo Canyon Independent Safety Committee (DCISC) for the period July 1, 2016 through June 30, 2017. This is the twenty-seventh annual report of the DCISC. The report is presented in two volumes.

Volume I includes a report summary and Conclusions and Recommendation (Executive Summary), a brief introduction and history regarding the DCISC, Committee activities, and documents received by the DCISC during the reporting period (Section 1.0), DCISC public meetings (Section 2.0), a review and evaluation of Nuclear Regulatory Commission (NRC) assessments and issues (Section 3.0), Committee Member and Consultant investigation topical summaries (Section 4.0), DCPP performance indicators monitored by the DCISC (Section 5.0), open items being followed by the Committee (Section 6.0), follow-up of Pacific Gas and Electric (PG&E) actions on previous DCISC recommendations (Section 7.0), input to the Committee by members of the public (Section 8.0), and PG&E’s response (Section 9.0) to recommendation in this report. The conclusions and recommendation also appear in bold face type throughout the main body of the report with a discussion of the subject involved.

Volume II contains a list of documents received by the DCISC, public meeting notices and agendas and minutes, a DCPP operations summary for the reporting period and organization charts (Exhibit C), full investigation reports by Committee Members and Consultants (Exhibits D1–D9), a record of plant tours by the DCISC (Exhibit E), the DCISC Open Items List (Exhibit F), communications and correspondence with members of the public (Exhibit G), DCISC recommendations and PG&E responses for the previous period (Exhibit H), the DCISC informational brochure (Exhibit I), and a glossary of terms (Exhibit J).

The DCISC invites questions and comments on this report.


For more information contact:

Diablo Canyon Independent Safety Committee
Office of the Legal Counsel
857 Cass Street, Suite D, Monterey, California 93940
Telephone: in California call 800-439-4688; outside of California call 831-647-1044
Send E-mail to: dcsafety@dcisc.org.