05000410/FIN-2018001-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Potential Inadequate 50.59 Evaluation for TS 3.3.1.1 Bases Change |
| Description | On February 23, 2018, Exelon personnel performed a 50.59 Screening for a change to Unit 2 TS Bases 3.3.1.1, Reactor Protection System (RPS) Instrumentation, for MSIV and TSV surveillance testing. Exelon personnel performed this activity to address operating experience associated with the use of a test box that prevents a scram signal during RPS surveillance testing for TS 3.3.1.1 Function 5 MSIV Closure and Function 8 TSV Closure. TS Bases B 3.3.1.1, C.1, Revision 1 was revised to state, in part, For Function 5 (MSIV Closure), this would require both trip systems to have at least one channel associated with the MSIVs for each main steam line in one Trip Logic Channel (not necessarily the same main steam lines for both trip systems), Operable or in trip (or the associated trip system in trip). For Function 8 (Turbine Stop Valve Closure), this would require both trip systems to have the channels for one Trip Logic Channel, Operable or in trip (or the associated trip system in trip).The inspectors questioned whether the change to TS Bases B 3.3.1.1 resulted in a change to the implementation of TS 3.3.1.1. A licensee is permitted to make changes to their Technical Specification Bases documents without NRC review and approval. However, in certain cases, such as a change to the Technical Specification Bases that would change how the associated Technical Specification is applied, NRC review and approval would be required.Planned Closure Action(s): The inspectors sent written questions to request assistance from NRR to determine whether this change to the TS Bases reasonably would have required NRC review and approval. The inspectors are opening a URI to determine if this is violation of 10 CFR 50.59 and if it is more than minor. Licensee Action: Documented NRCs concern as AR 04055602. Exelons position is the change would not affect how TS 3.3.1.1, or its note, is applied and therefore NRC review was not required.Corrective Action Reference: AR04055602 NRC Tracking Number: 05000410/2018001-02 |
| Site: | Nine Mile Point  |
|---|---|
| Report | IR 05000410/2018001 Section 1R18 |
| Date counted | Mar 31, 2018 (2018Q1) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.18 |
| Inspectors (proximate) | E Miller B Sienel G Stock R Rolph M Catts |
| INPO aspect | |
| ' | |
Finding - Nine Mile Point - IR 05000410/2018001 | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Nine Mile Point) @ 2018Q1
Self-Identified List (Nine Mile Point)
| |||||||||||||||||||||||||||||||||||