PNP 2015-058, Technical Specification Required Report
| ML15216A058 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 08/04/2015 |
| From: | Hardy J Entergy Nuclear Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| PNP 2015-058 | |
| Download: ML15216A058 (2) | |
Text
.:::. Entergy PN P 2015-058 August3,2015 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001
SUBJECT:
Technical Specification Required Report Palisades Nuclear Plant Docket 50-255 License No. DPR-20 Entergy Nuclear Operations, Inc.
Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043 Tel 269 764 2000 Jeffery A. Hardy Regulatory Assurance Manager
REFERENCE:
Palisades Technical Specification 5.6, Reporting Requirements
Dear Sir or Madam:
Palisades Technical Specification, Section 5.6.6, Post Accident Monitoring Report, requires a report be submitted to the Nuclear Regulatory Commission within 14 days when a post-accident monitoring instrument, required by Technical Specification 3.3.7, Post Accident Monitoring Instrumentation, is not restored to operable status within 30 days.
Containment Level Indicating Transmitter, LlT-0446B, required by Technical Specification 3.3.7, has been inoperable for greater than 30 days. Per Technical Specification 5.6.6, the attached report outlines the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the instrumentation channel to operable status.
This letter contains no new commitments and no revisions to existing commitments.
Sincerely, JAH/tad
Attachment:
Technical Specification Required Report for Inoperable Containment Level Indicating Transmitter, LIT -0446B CC:
Administrator, Region III, USNRC Project Manager, Palisades, USNRC Resident Inspector, Palisades, USNRC
ATTACHMENT 1 TECHNICAL SPECIFICATION REQUIRED REPORT FOR INOPERABLE CONTAINMENT LEVEL INDICATING TRANSMITTER, LlT-0446B BACKGROUND LlT-04468, Containment Level Indicating Transmitter, was declared inoperable on June 21, 2015, after failing to meet Technical Specification surveillance test acceptance criteria.
PREPLANNED ALTERNATE METHOD OF MONITORING LlT-04468 is not modeled in PRA, nor is it credited in FSAR Chapter 14 accident analysis. It is primarily used to confirm safety functions are satisfied.
The redundant train, LlT-0446A, Containment Level Indicating Transmitter, is used as the primary alternate method for monitoring post-accident containment water level. In case of a loss of the alternate containment floor level indicator, alternate means exist to monitor for potential inadequate suction head for the High Pressure Injection pumps I Containment Spray pumps, post-RAS (Recirculation Actuation Signal). These indications are contained in Emergency Operating Procedure (EOP) Supplement 42, Section 4.0. In addition, there are two narrow range containment sump level indicators that provide sump level and trend up to the floor level.
CAUSE OF INSTRUMENT INOPERABILITY The cause for inoperability of LIT -04468 was determined to be the failure of an electrolytic capacitor within the transmitter's converter module.
The most likely cause of the electrolytic capacitor failure was due to age. LlT-04468 had been in-service for greater than ten years.
PLANS AND SCHEDULE FOR RESTORING INSTRUMENT OPERABILITY A qualified equivalent replacement for the failed electrolytic capacitor has been received and is currently being installed. Following successful post-maintenance testing, LlT-04468 will be declared operable.
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