ML053260243

Entergy Siren Presentation 11-16-05

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

Introduction and Overview Fred Dacimo Site Vice President Indian Point Energy Center 2

Agenda

• Introduction - Fred Dacimo

• Energy Policy Act of 2005 - Mike Slobodien

• Siren Notification System - Frank Inzirillo

• Closing Remarks - Fred Dacimo 3

Overview

• Compliance with the Energy Policy Act of 2005

• Replacement plan for the siren system

• Current siren system performance

• Improvements to current system 4

Energy Policy Act of 2005 Compliance Plan Michael Slobodien Director, Emergency Programs Entergy Nuclear Northeast 5

Applicability of the Energy Act

• Alert Notification Systems

- Components subject to backup power

• Sirens

• Supervisory Control and Data Acquisition (SCADA) controllers

• Proprietary communications devices Note: Commercial communications devices already use back up power devices 6

Siren System Components

• Siren

• Power Supply

• Supervisory Control and Data Acquisition (Control System)

• Communications Network 7

System Attributes

• Performance Guidelines

- Outdoor Public Alerting Systems (FEMA document)

• Specific Attributes

- Signal duration

- Power supply

- Battery recharge

- Standby mode 8

System Options

• Siren

- 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 9

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 10

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 11

Siren Replacement Schedule

• We expect to complete this project by January 2007

• A comprehensive schedule will be prepared following issuance of contracts 12

Current Siren System Frank Inzirillo Manager, Emergency Preparedness 13

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 14

Siren Details Rotating Statistics:

Siren Mostly 15 horsepower 220 volts Antenna 119 decibels 50 feet 4-minute Control sound Box Siren Pole 15

Recent Control System Upgrades

• Computer-based control system

• Continuous monitoring checks every 30 minutes

• Additional sensing on actuation

• New control panels

• Dual actuation capability 16

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 17

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%

18

Overall Siren Reliability Source: NRC web site 19

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%

20

Siren System Availability Siren System Availability (3-year average)

.4%

Siren System 99.6%

Unavailability (3-year average) 21

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 22

Siren System Challenges

• Frame Relay

• Rotation Sensors

• Software Control

• Power

• Communications 23

Frame Relay - Data Transmission Circuit County Phone routers Computer Company Entergy System 24

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 25

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 26

Software Control Issues

• System Files

• Software Changes 27

Power and Communications

• Under-voltage relays

• Utility transformers

• Antenna orientation 28

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 29