IR 05000424/2015008
| ML15127A591 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 05/07/2015 |
| From: | Masters A Reactor Projects Branch 7 |
| To: | Taber B Southern Nuclear Operating Co |
| References | |
| IR 2015008 | |
| Download: ML15127A591 (16) | |
Text
UNITED STATES May 7, 2015
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT - NRC PROBLEM IDENTIFICATION AND RESOLUTION INSPECTION REPORT 05000424/2015008 AND 05000425/2015008
Dear Mr. Taber:
On April 2, 2015, the U. S. Nuclear Regulatory Commission (NRC) completed an inspection at your Vogtle Electric Generating Plant Units 1 and 2. The enclosed report documents the inspection findings, which were discussed on April 2, 2015, with Mr. G. Saxon and other members of your staff.
On the basis of the samples selected for review, the inspectors concluded that, in general, problems were properly identified, evaluated, and corrected. In reviewing your corrective action program, the inspectors assessed how well your staff identified problems at a low threshold, your staffs implementation of the stations process for prioritizing and evaluating these problems, and the effectiveness of corrective actions taken by the station to resolve these problems. In each of these areas, the inspectors determined that your staffs performance was adequate to support nuclear safety.
The inspectors also evaluated other processes your staff used to identify issues for resolution.
These included your use of audits and self-assessments to identify latent problems and your incorporation of lessons learned from industry operating experience into station programs, processes, and procedures. The inspectors determined that your stations performance in each of these areas supported nuclear safety.
Finally, the inspectors determined that your stations management maintains a safety-conscious work environment adequate to support nuclear safety. Based on the inspectors observations, your employees are willing to raise concerns related to nuclear safety through at least one of the several means available. In accordance with 10 CFR 2.390 of the NRCs Agency Rules of Practice and Procedure, a copy of this letter and its enclosure will be available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of the NRCs document system (ADAMS). Adams is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely,
/RA By Reinaldo Rodriguez For/
Anthony D. Masters, Chief Reactor Projects Branch 7 Division of Reactor Projects Docket Nos. 50-424, 50-425 License Nos. NPF-68, NPF-81
Enclosure:
IR 05000424/2015008, 05000425/2015008 w/Attachment: Supplementary Information
REGION II==
Docket Nos.: 50-424, 50-425 License Nos.: NPF-68, NPF-81 Report Nos.: 05000424/2015008 and 05000425/2015008 Licensee: Southern Nuclear Operating Company, Inc. (SNC)
Facility: Vogtle Electric Generating Plant, Units 1 and 2 Location: Waynesboro, GA 30830 Dates: March 16 - April 2, 2015 Inspectors: Wesley Deschaine, Resident Inspector Sequoyah (Team Leader)
Shani Lewis, Project Engineer Natasha Childs, Resident Inspector Oconee Ryan Taylor, Senior Project Inspector Approved by: Anthony D. Masters, Chief Reactor Projects Branch 7 Division of Reactor Projects Enclosure
SUMMARY
IR 05000424/2015008 and 05000425/2015008; March 16 - April 2, 2015; Vogtle Electric
Generating Plant, Units 1 and 2; Biennial Inspection of the Problem Identification and Resolution Program.
The inspection was conducted by two resident inspectors, a senior project inspector, and a project engineer. No findings were identified. The NRCs program for overseeing the safe operation of commercial nuclear power reactors is described in NUREG-1649, Reactor Oversight Process, Revision 5.
Identification and Resolution of Problems The inspectors concluded that, in general, problems were properly identified, evaluated, prioritized, and corrected. The licensee was effective at identifying problems and entering them into the corrective action program (CAP) for resolution, as evidenced by the relatively few number of deficiencies identified by external organizations (including the NRC) that had not been previously identified by the licensee, during the review period. Generally, prioritization and evaluation of issues were adequate, formal root cause evaluations for significant problems were adequate, and corrective actions specified for problems were acceptable. Overall, corrective actions developed and implemented for issues were generally effective and implemented in a timely manner.
The inspectors determined that overall, audits and self-assessments were adequate in identifying deficiencies and areas for improvement in the CAP, and appropriate corrective actions were developed to address the issues identified. Operating experience usage was found to be generally acceptable and integrated into the licensees processes for performing and managing work and plant operations.
Based on discussions and interviews conducted with plant employees from various departments, the inspectors determined that personnel at the site felt free to raise safety concerns to management and use the CAP to resolve those concerns.
REPORT DETAILS
4OA2 Problem Identification and Resolution
1. Corrective Action Program Effectiveness
a. Inspection Scope
The inspectors reviewed the licensees CAP procedures which described the administrative process for initiating and resolving problems primarily through the use of condition reports (CRs). To verify that problems were being properly identified, appropriately characterized, and entered into the CAP, the inspectors reviewed CRs that had been issued between February 2013 and February 2015, including a detailed review of selected CRs associated with the following risk-significant systems: Emergency Diesel Generators (EDGs), Nuclear Service Cooling Water (NSCW), 125VDC Electrical, and 4160V Electrical systems. Where possible, the inspectors independently verified that the corrective actions were implemented as intended. The inspectors also reviewed selected common causes and generic concerns associated with root cause evaluations (RCE) to determine if they had been appropriately addressed. To help ensure that samples were reviewed across all cornerstones of safety identified in the Reactor Oversight Process (ROP), the inspectors selected a representative number of CRs that were identified and assigned to the major plant departments, including operations, maintenance, engineering, health physics, chemistry, emergency preparedness, and security. These CRs were reviewed to assess each departments threshold for identifying and documenting plant problems, thoroughness of evaluations, and adequacy of corrective actions. The inspectors reviewed selected CRs, verified corrective actions were implemented, and attended meetings where CRs were evaluated for significance to determine whether the licensee was identifying, accurately characterizing, and entering problems into the CAP at an appropriate threshold.
Plant walkdowns of equipment within the selected systems listed above and other plant areas were conducted by inspectors to assess the material condition and to identify deficiencies that had not been previously entered into the CAP. The inspectors reviewed CRs, maintenance history, corrective actions (CAs), completed work orders (WOs) for the systems, and reviewed associated system health reports. These reviews were performed to verify that problems were being properly identified, appropriately characterized, and entered into the CAP. Items reviewed generally covered a two-year period of time; however, in accordance with the inspection procedure, a five-year review was performed for selected systems for age-related issues.
Control Room walk-downs were also performed to assess the main control room (MCR)deficiency list and to ascertain if deficiencies were entered into the CAP and tracked to resolution. Operator workarounds (OWA) and operator burden screenings were reviewed, and the inspectors verified compensatory measures for deficient equipment which were being implemented in the field.
The inspectors conducted a detailed review of selected CRs to assess the adequacy of the root cause and apparent cause evaluations of the problems identified. The inspectors reviewed these evaluations against the descriptions of the problem described in the CRs and the guidance in licensee procedure NMP-GM-002-GL03, Cause Analysis and Corrective Actions Guideline. The inspectors assessed if the licensee had adequately determined the cause(s) of identified problems, and had adequately addressed operability, reportability, common cause, generic concerns, extent-of-condition, and extent-of-cause. The review also assessed if the licensee had appropriately identified and prioritized corrective actions to prevent recurrence.
The inspectors reviewed selected industry operating experience (OE) items, including NRC generic communications, to verify that they had been appropriately evaluated for applicability and that issues identified through these reviews had been entered into the CAP.
The inspectors reviewed site trend reports, to determine if the licensee effectively trended identified issues and initiated appropriate corrective actions when adverse trends were identified.
The inspectors reviewed licensee audits and self-assessments, including those which focused on problem identification and resolution programs and processes, to verify that findings were entered into the CAP and to verify that these audits and assessments were consistent with the NRCs assessment of the licensees CAP.
The inspectors attended various plant meetings to observe management oversight functions of the corrective action process. These included CR screening meetings and Management Review Committee (MRC) meetings.
Documents reviewed are listed in the Attachment.
b. Assessment Problem Identification The inspectors determined that the licensee was generally effective in identifying problems and entering them into the CAP and there was an appropriately low threshold for entering issues into the CAP. This conclusion was based on a review of the requirements for initiating CRs as described in licensee procedure NMP-GM-002-001, Corrective Action Program Instructions, managements expectation that employees were encouraged to initiate CRs for any reason. Trending was generally effective in monitoring equipment performance. Site management was actively involved in the CAP and focused appropriate attention on significant plant issues. Based on reviews and walkdowns of accessible portions of the selected systems, the inspectors determined that system deficiencies were being identified and placed in the CAP.
A performance deficiency was identified during the inspection associated with the sites failure to identify and correct the condition adverse to quality discovered during the failure analysis for the 2B EDG bridge transfer switch. Specifically, the failure analysis report concluded that the bridge transfer switch failed due to hardened and degraded grease not being properly removed during preventative maintenance (PM). The report also concludes that the PM procedure may be inadequate to remove the older grease and should be updated to mitigate future failures. The site has entered this issue into the CAP as CRs 10041480 and 10043156. However, because this performance deficiency did not adversely affect any ROP cornerstone objectives, the inspectors determined the issue was of minor significance and not subject to enforcement action in accordance with the NRCs Enforcement Policy.
Problem Prioritization and Evaluation Based on the review of CRs sampled by the inspection team during the onsite period, the inspectors concluded that problems were generally prioritized and evaluated in accordance with the licensees CAP procedures as described in the CR severity level determination guidance in NMP-GM-002-001. Each CR was assigned a priority level at the CAP coordinator (CAPCO) meeting, and adequate consideration was given to system or component operability and associated plant risk.
The inspectors determined that station personnel had conducted root cause and apparent cause analyses in compliance with the licensees CAP procedures and assigned cause determinations were appropriate, considering the significance of the issues being evaluated. A variety of formal causal-analysis techniques were used depending on the type and complexity of the issue consistent with NMP-GM-002-GL03.
The inspectors identified three performance deficiencies associated with the licensees prioritization and evaluation of issues. These issues were screened in accordance with Manual Chapter 0612, Issue Screening, and were determined to be of minor significance and not subject to enforcement action in accordance with the NRCs Enforcement Policy.
- The inspectors reviewed Corrective Action Report (CAR) 210971 associated with a NRC non-cited violation (NCV), and identified the following issues with the Apparent Cause Determination (ACD):
o Technical Evaluation (TE) 860480 was a corrective action for Operations training to perform a Gap Analysis to address potential knowledge gaps identified by the apparent cause team. This action was one of several actions to resolve apparent cause #1 (AC1) and contributing cause #1 (CC1) of the ACD. The priority level of TE 860480 was downgraded from a level 2 to level 3 without following the process as outlined in section 4.6 of NMP-GM-002-001. Additionally, the apparent cause analysts did not follow the process outlined in NMP-GM-002-GL03 when initially assigning the corrective action. The licensee has entered these issues into the CAP as CRs 10047594 and 10047596.
o TE 853634 was a corrective action for the Chemistry department to perform a department stand down to discuss upcoming procedure changes as a result of the event. The action was one of several actions to resolve AC1 and CC1 of the ACD. The action due date was extended without following NMP-GM-002-001.
There was no assessment of the potential impact of the extension and the appropriate level of management approval was not received. The licensee has entered this issue into the CAP as CR 100475594.
- The inspectors reviewed CAR 211142 associated with an NRC NCV and identified the following issue with the Apparent Cause Determination:
o The ACD report listed seven corrective actions to address AC1; none of the seven actions were assigned a priority level 2, which is not in accordance with NMP-GM-002-001. This procedure states that corrective actions assigned to address an apparent cause should be assigned a level 2 priority. The potential weakness in assigning the incorrect priority level is that the action could potentially be revised and/or receive due date extensions without receiving the appropriate levels of review appropriate for the significance. The licensee has entered this issue into the CAP as CR 10049368.
Corrective Actions Based on a review of corrective action documents, interviews with licensee staff, and verification of completed corrective actions, the inspectors determined that overall, corrective actions were timely, commensurate with the safety significance of the issues, and effective, in that conditions adverse to quality were corrected and non-recurring. For significant conditions adverse to quality, the corrective actions directly addressed the cause and effectively prevented recurrence in that a review of performance indicators, CRs, and effectiveness reviews demonstrated that the significant conditions adverse to quality had not recurred. Effectiveness reviews for corrective actions to prevent recurrence (CAPRs) were sufficient to ensure corrective actions were properly implemented and were effective.
c. Findings
No findings were identified.
2. Use of Operating Experience
a. Inspection Scope
The inspectors examined the licensees use of industry OE to assess the effectiveness of how external and internal operating experience information was used to prevent similar or recurring problems at the plant. In addition, the inspectors selected operating experience documents (e.g., NRC generic communications, 10 CFR Part 21 reports, licensee event reports, vendor notifications, and plant internal operating experience items, etc.), which had been issued since February 2013, to verify whether the licensee had appropriately evaluated each notification for applicability to the Vogtle Electric Generating Plant, Units 1 and 2, and whether issues identified through these reviews were entered into the CAP.
b. Assessment Based on a review of selected documentation related to operating experience issues, the inspectors determined that the licensee was generally effective in screening operating experience for applicability to the plant. Industry OE was evaluated at either the corporate or plant level depending on the source and type of the document. Relevant information was then forwarded to the applicable department for further action or informational purposes. OE issues requiring action were entered into the CAP for tracking and closure. In addition, operating experience was included in all apparent cause and root cause evaluations in accordance with licensee procedure NMP-GM-002-GL03.
c. Findings
No findings were identified.
3. Self-Assessments and Audits
a. Inspection Scope
The inspectors reviewed audit reports and self-assessment reports, including those which focused on problem identification and resolution, to assess the thoroughness and self-criticism of the licensee's audits and self-assessments, and to verify that problems identified through those activities were appropriately prioritized and entered into the CAP for resolution in accordance with licensee procedure NMP-GM-003, Self-Assessment and Benchmark Procedure.
b. Assessment The inspectors determined that the scopes of assessments and audits were adequate.
Self-assessments were generally detailed and critical, as evidenced by findings consistent with the inspectors independent review. The inspectors verified that CRs were created to document areas for improvement and findings resulting from the self-assessments, and verified that actions had been completed consistent with those recommendations. Generally, the licensee performed evaluations that were technically accurate.
c. Findings
No findings were identified.
4. Safety-Conscious Work Environment
a. Inspection Scope
During the course of the inspection, the inspectors assessed the stations safety-conscious work environment (SCWE) through review of the stations Employee Concerns Program (ECP) and interviews with various departmental personnel. The inspectors reviewed a sample of ECP issues to verify that concerns were being properly reviewed and identified deficiencies were being resolved and entered into the CAP when appropriate.
b. Assessment Based on the interviews conducted and the CRs reviewed, the inspectors determined that licensee management emphasized the need for all employees to identify and report problems using the appropriate methods established within the administrative programs, including the CAP and ECP. These methods were readily accessible to all employees.
Based on discussions conducted with a sample of plant employees from various departments, the inspectors determined that employees felt free to raise issues, and that management encouraged employees to place issues into the CAP for resolution. The inspectors did not identify any reluctance on the part of the licensee staff to report safety concerns.
c. Findings
No findings were identified.
4OA6 Exit
Exit Meeting Summary
On April 2, 2015, the inspectors presented the inspection results to Mr. G. Saxon and other members of the site staff. The inspectors confirmed that proprietary information was not provided or examined during the inspection.
ATTACHMENT:
SUPPLEMENTARY INFORMATION
KEY POINTS OF CONTACT
Licensee personnel
- G. Saxon, Plant Manager
- G. Gunn, Regulatory Affairs Manager
- J. Wade, Site Design Engineering Manager
- K. Morrow, Licensing Engineer
- K. Walden, Licensing Engineer
- M. Carstensen, Engineer
- M. Cline, Site CAPCO
- T. Thompson, Site System Engineering Manager
- T. Simmons, PI Manager
- T. Moorer, Director EHS
NRC personnel
- A. Alen, Resident Inspector
- M. Cain, Senior Resident Inspector
LIST OF REPORT ITEMS
Opened and Closed
None
Closed
None
Discussed
None