ML053260243
| ML053260243 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 11/16/2005 |
| From: | Dacimo F Entergy Nuclear Northeast |
| To: | Office of Nuclear Reactor Regulation |
| Boska J, NRR, 301-415-2901 | |
| References | |
| Download: ML053260243 (29) | |
Text
NRC Public Meeting Alert Notification System Indian Point Energy Center November 16, 2005
2 Introduction and Overview Fred Dacimo Site Vice President Indian Point Energy Center
3 Agenda
- Introduction - Fred Dacimo
- Energy Policy Act of 2005 - Mike Slobodien
- Siren Notification System - Frank Inzirillo
- Closing Remarks - Fred Dacimo
4 Overview
- Compliance with the Energy Policy Act of 2005
- Replacement plan for the siren system
- Current siren system performance
- Improvements to current system
5 Energy Policy Act of 2005 Compliance Plan Michael Slobodien Director, Emergency Programs Entergy Nuclear Northeast
6 Applicability of the Energy Act
- Alert Notification Systems
- Components subject to backup power
- Supervisory Control and Data Acquisition (SCADA) controllers
- Proprietary communications devices Note: Commercial communications devices already use back up power devices
7 Siren System Components
- Power Supply
- Supervisory Control and Data Acquisition (Control System)
- Communications Network
8 System Attributes
- Performance Guidelines
- Outdoor Public Alerting Systems (FEMA document)
- Specific Attributes
- Signal duration
- Power supply
- Battery recharge
- Standby mode
9 System Options
- omni-directional with direct current power supply and battery back up in event of loss of normal power
- SCADA (Supervisory Control and Data Acquisition)-use commercially available equipment
- Communications - redundant independent systems
- Back Up Power Device - electric storage devices Note: Various systems under technical review
10 System Attributes
- Batteries
- Life span
- Weather resistant
- Back Up Power for Other Components
- Will use existing installed equipment or dedicated equipment
- Commercial networks back up power
11 System Attributes
- Preventative Maintenance
- A preventative maintenance and test program will be used to ensure that all components work as intended
- Back Up Power Security
- For field installations, if special battery devices (e.g.
marine type batteries) are used, they will be housed in tamper resistant enclosures
12 Siren Replacement Schedule
- We expect to complete this project by January 2007
- A comprehensive schedule will be prepared following issuance of contracts
13 Current Siren System Frank Inzirillo Manager, Emergency Preparedness
14 Basic Siren System Design
- 156 Sirens
- Power supplied from electrical grid
- 10 Putnam, 16 Orange, 51 Rockland, 79 Westchester
- Actuated from each County
- Can be sounded via a Frame Relay or Radio Network
15 Rotating Siren Antenna Control Box Siren Pole 50 feet Siren Details Statistics:
Mostly 15 horsepower 220 volts 119 decibels 4-minute sound
16 Recent Control System Upgrades
- Computer-based control system
- Continuous monitoring checks every 30 minutes
- Additional sensing on actuation
- New control panels
- Dual actuation capability
17 Siren Performance Measurements
- Overall Siren Reliability
- Measures siren system response to scheduled tests
- Overall System Availability
- Monitors the state of readiness of the sirens on a continuous 24-hour a day basis
- Feedback System Accuracy
- Verifies the feedback system reported accurately
18 Overall Siren Reliability Would the sirens have sounded if required based on test results?
- 2 silent tests each month for every county
- 1 full alert or short term sounding each quarter
- Measures individual siren performance
- Based on about 4000 tests conducted in last 12 months
- Current Reliability = 98.2%
19 Source: NRC web site Overall Siren Reliability
20 Siren System Availability Was the siren system available in a stand-by status ready to sound if demanded?
- Measures continuous readiness of the siren system
- Measured based on recorded system and individual siren outages
- Measured over last 3 years
- Average 99.6%
21 Siren System Availability Siren System Availability (3-year average)
Siren System Unavailability (3-year average) 99.6%
.4%
22 Siren Feedback System Accuracy Did the feedback system accurately indicate which sirens sounded?
- Looked at 14 tests conducted since the system installed
- Average accuracy at 96%
- Measures the reporting accuracy of the feedback system for full soundings
23 Siren System Challenges
- Frame Relay
- Rotation Sensors
- Software Control
- Power
- Communications
24 Frame Relay - Data Transmission Circuit Entergy System routers Entergy System County Computer Phone Company
25 Data Transmission Upgrades
- New Routers
- Installing and will be monitored by the phone carrier 24/7
- Parallel Circuit
- Automatic switching
- Upgrades Scheduled for Completion 12/31
- Previous Upgrades:
- replaced router
- circuit card replacement
- fiber optic cable upgrade
- moved circuit location
26 Rotation Sensors
- Rotation Sensor reports back when siren rotates
- Bird nesting can interfere
- Can report a failure even if the siren rotates properly places an unnecessary burden on counties to route alert
27
- System Files
- Software Changes Software Control Issues
28 Power and Communications
- Under-voltage relays
- Utility transformers
- Antenna orientation
29 Summary
- 2003-2005 Siren System Availability 99.6%
(3-year average)
- Confidence issues exist due to reporting accuracy and system challenges
- Corrective Actions in progress to address issues and improve confidence in system
- Siren system replacement will address lessons learned