Torness - SBI and LC32 Inspection
- Site: Torness
- IR number: 17-163
- Date: November 2017
- LC numbers: 10, 23, 24, 27, 28, 34
Purpose of Intervention
The purpose of this joint ONR / SEPA intervention was to undertake planned inspections at EDF Nuclear Generation Limited's (NGL) Torness Power Station in accordance with the planned inspection programme contained in the Torness Integrated Intervention Strategy (IIS) for 2017/18.
Interventions Carried Out by ONR
A team comprising the ONR and SEPA Site Inspectors, two ONR Nuclear Legacy Specialists and an LMfS specialist undertook a system based inspection of the solid and gaseous radioactive waste systems, during which we assessed compliance against the following licence conditions:
- LC 10: Training
- LC 23: Operating Rules
- LC 24: Operating Instructions
- LC 27: Safety Mechanisms
- LC 28: Examination, Inspection, Maintenance, and Testing (EIM&T)
- LC 34: Leakage and escape of radioactive material and radioactive waste
The intervention included a compliance inspection against site Licence Condition 32 (LC 32 - accumulation of radioactive waste).
Explanation of Judgement if Safety System Not Judged to be Adequate
Based on the evidence sampled during this inspection we judged that the solid and gaseous radioactive waste systems meet the requirements of the safety case.
Key Findings, Inspector's Opinions and Reasons for Judgements Made
In relation to the system based inspection of the solid and gaseous radioactive waste systems, we made the following observations and judgements:
- LC 10 - Training: we sampled the training records of two system engineers and a relevant Operator Technician and Maintenance Technician. In all instances we observed sufficient evidence of competency assessment and monitoring, commensurate with the individuals' time in post.
- LC 23 - Operating Rules: we observed suitable alignment and consistency between claims for the systems and the relevant Environmental Specifications.
- LC 24 - Operating Instructions: we sampled relevant operating and maintenance instructions relating to the systems. We observed good quality operating instructions and complete records of tasks completed for the sampled operations.
- LC 27 - Safety Mechanisms: we were satisfied that the systems are being managed in such a way that components with safety significance are available and in good working order.
- LC 28 - EIM&T: we were content from the plant maintenance schedule entries sampled that EIM&T is being undertaken on the systems to schedule and to an appropriate standard.
- LC 34 - Leakage and Escape of Radioactive Material and Radioactive Waste: we were satisfied that key components for the prevention and detection of leaks had been identified and that routine monitoring of boreholes, as secondary leak detection for the HADV, was being carried out in line with the maintenance schedule requirements.
- Plant walkdown: we found the areas of plant sampled to be in good condition, with good standards of housekeeping being upheld.
With regard to the LC 32 compliance inspection, we made the following observations:
- We undertook a walk down of the Active Solid Waste Building (ASWB), observing good standards of housekeeping and maintenance. We observed evidence of implementation of the waste hierarchy and noted the development of an improved radioactive waste inventory recording tool.
- We inspected EDF NGL's corporate and station LC32 compliance arrangements, and inspected their implementation by examining station records of the HADV inventory and a sample of ASWB drummed desiccant waste records; all records were found to be adequate.
The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.
Conclusion of Intervention
From the evidence gathered during the system based inspection of solid and gaseous radioactive waste systems, we assigned inspection ratings of ‘Green' (no formal action) for LC 10, LC 23, LC 24, LC 27, LC 28 and LC 34.
From the evidence gathered during the LC 32 compliance inspection, we assigned an inspection rating of ‘Green'.
There are no findings from this inspection that could significantly undermine nuclear safety at Torness Power Station.