ML20040G060
| ML20040G060 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 02/04/1982 |
| From: | Bordine T CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| RTR-NUREG-0654, RTR-NUREG-654 NUDOCS 8202110195 | |
| Download: ML20040G060 (23) | |
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PRINCIPAL STAFF JTR I/1/T'i s s CORSumBf5 E
power no Company DR&PI General offices: 212 West Michigan Avenue, Jack son, MI 49201 * (517) 788 0550 DTI February 4, 1982 Q
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James G Keppler, Administrator
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BIG ROCK POINT PLANT - PROMPT NOTIFICATION SYSTEM ADDITIONAL INFORMATION Our letter dated January 19, 1982 identified our commitment to complete installation of the Prompt Public Notification System by February 1, 1982.
This letter provides confirmation that the warning system was installed and fully operational by February 1, 1982.
NRC letter dated December 7, 1981 requested the following additional information on the Palisades Plant Prompt Notification System:
1.
The number of sirens to be installed and the rating.
2.
Maps of siren locations.
3.
Percent of population to be notified in 15 minutes.
4.
Notification process of people who do not hear the initial signal.
This information was supplied by letter dated January 25, 1982.
In response i
to these requests, Consumers Power Company is also providing the attached description of the Big Rock Point Public Warning System. This description provides not only the requested information it also incorporates details l
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Mr James G Keppler 2
Big Rock Point-Plant February 4, 1982 s
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regarding system control ~and activiation. Please note that the referenced appendices are not included but are available upon request if needed for your j
information.
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thsj Thomas C Bordine Staff Licensing Engineer CC - Director, Office of Nuclear Reactor Regulatis o
l Director, Office of Inspection and Enforcement NRC Resident Inspector-Big Rock Point Office of the Federal Emergency Management Agency (FEMA)
Michigan State Police Emergency Services Division 6 pages i
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PROMPT NOTIFICATION SYSTEM ADDITIONAL INFORMATION Big Rock Point Plant nuo282-0002bl42 2/82
Prompt Notification System-BRP 1
I.
INTRODUCTION REQUIREMENT The Nuclear Regulatory Commission requires all functional, nuclear-powered electric generating plants to implement a Public Warning System capable of alerting the public within the nuclear plant's Emergency Planning Zone. System capabilities as outlined in NUREG-0654 require that the following criteria be met prior to Nuclear Regulatory Commission approval:
The Public Warning System must be capable of providing a warning signal and instructional message to the population throughout the five-mile radius Emergency Planning Zone within 15 minutes.
The initial notification must insure direct coverage of essentially 100 percent of the population within five miles of the plant.
The Public Warning System design should consider the demography and topography of the Emergency Planning Zone. The system design j
criteria should have a sound level target of 10 dB above the average daytime ambient noise level in the Emergency Planning Zone.
The Public Warning System should include the capacity for local and state agencies to provide information over television and radio stations at the time a system alert is given.
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Prompt Hotification System-BRP 2
PURPOSE The Big Rock Public Warning System provides a means to alert the public in a geographic region inland from the Big Rock Point Plant as speci-fled by the Nuclear Regulatory Commission and outlined in Section 1.1 of this report.
The system is capable of ale. ting 100 percent of the public within a 160' section to the south-southeast of the Big Rock Point Plant. Each of the siren /PA units is controlled by a radio signal activated by the primary control center located in the Charlevoix County Sheriff's Department, and the secondary control point at the Big Rock Point Plant.
SYSTEM CAPABILITIES The Big Rock Public Warning System is capable of providing an alert signal and instructional message to the population throughout the five-mile radius Emergency Planning Zone within 15 minutes.
Backup power insures normal operation in the event of a power I
outage.
Specific population groups are alerted by the selective activation of all siren units, geographically related siren units or individual sirens.
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3 The system is controlled by a primary and_a secondary control point:
- Charlevoix County Sheriff's Department (encoder, transmitter and status map)
- Big Rock Point Plant (encoder, transmitter and status map)
Each siren /PA unit is capable of four different modes of operation:
- Public Warning Signal Local Alert Signal
- National Attack Signal
- Public Address The system is capable of automatic operation through the use of pre-recorded activation tapes.
Public warning receivers where necessary will be employed in facilities where high ambient noise levels preclude notification by the siren system. The public warning receivers are activated by the system control points and are capable of visual signaling as well as instructional messages.
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II.
DEFINITIONS Activating Agency - The agency that activates the system (in whole or in part).
Ambient Noise Level - Average noise level surrounding a specific area.
Decibel (d3) - A unit used to express a relative difference in power, usually ten times the common logarithm of the ratio of the two levels.
Encoder - An electronic device capable of generating audio signals for the purpose of activating siren /PA units.
i EPZ (Emergency Planning Zone) - The region within a given radius immediately surrounding a nuclear power plant.
Section 1/2' pie-shaped portion of a circle.
Segment - Annulus within a section.
Siren /PA - An electronic device capable of generating a siren sound and reproducing voice message information.
Stations - Siren /PA site locations.
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Status Map Board - Displays status of each siren /PA unit and control center.
Trisection - Three adjacent sections.
Trisegment - Three adjacent segments.
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Prompt Notification System-BRP III. OPERATIONAL AUTHORIZATION AND COMPLIANCE AUTHORIZATION The authority to operate the Big Rock Public Warning System is de-scribed in Annex B (Warning) to Michigan Emergency Preparedness Plan with Appendix 1 (Nuclear Facilities Procedures), which is included in this document as Appendix F.
System Control The Big Rock Public Warning System is under the administrative control of the Charlevoix Emergency Preparedness Coordinator with direct control at the two system control points. He is responsible for the dissemination of public information preceding all system tests. Such tests will be monitored and documented as described in 6.1.1.
The following officials possess the authority to order the emergency activation of the Big Rock Public Warning System:
Charlevoix County Emergency Preparedness Coodinator Charlevoix County Sheriff Superintendent Big Rock Point Plant ma1281-0345d-87-42 i
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Prompt Notification System-BRP Activation The system may be activated only by properly trained personnel.
THE SYSTEM MAY BE ACTIVATED FOR THE PURPOSE OF WARNING AND NOTIFYING THE PUBLIC OF AN EMERGENCY CONDITION AFFECTING THE PUBLIC HEALTH AND SAFETY AND SCHEDULED TESTS ONLY.
UNAUTHORIZED OPERATION OF THE PUBLIC VARNING SYSTEM WILL RESULT IN PROSECUTION TO THE FULLEST EXTENT OF THE LAW COMPLIANCE The operation of the Public Warning System is in compliance with established Federal, State and local acts and statutes.
Nuclear Regulatory Commission / Federal Emergency Management Administration The system design is in compliance with the following NRC and FEMA requirements:
I Nuclear Regulation 0654, as amended Federal Emergency Management Administration - REP-1 h
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7 Prompt Notification System-BRP Federal Communications Commission The operation of the radio control system for the Public Warning System is in compliance with FCC Rules and Regulations Part 90 governing the use of secondary signaling in the public safety radio. band.
Local Regulations The Public Warning System is in compliance with'all known local-regulations for public warning systems and noise levels.
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Prompt Notification System-BRP 8
IV.
EQUIPMENT FUNCTIONS AND CAPABILITIES SIREN /PA UNITS The Big Rock Public Warning System consists of 11 pole-mounted speaker assemblies, each of which contains 16 drivers stacked in a cingle column which oscillates to provide 360 degrees coverage of sound. A radio receiver, tone generator, audio amplifier, and continuous-duty power supply are contained in an equipment cabinet mounted near the base of each pole.
Each siren /PA unit is a completely solid-state device. Each unit derives its power from self-contained lead-acid storage batteries which are continuously charged from a 120 V ac line source. This assures normal operation of the unit for up to 30 minutes during power outages.
The control cabinet houses the following items:
Power Amplifier Module: Eight units supply high-level audio signals to the horns. E'ach unit delivers 200 watts RMS for two horns in PA mode and 250 watts per two horns in siren mode. This produces a 124 dB(A) sound level at 100 ft (siren mode).
Tone Generator Module: Produces tones used in the warning system:
wail, hi-lo, and alert. Also shuts down siren /PA unit automatically after approximately 3-1/2 minutes.
Radio Receiver and Tone Decoder: Receives radio signals broadcast from system control centers. Checks for preper frequencies and ma1281-0373a-87-42
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codes. Instructs tone generator to activ ate proper (requested) function.
Batteries and Batterv Charger: Recharges the batteries after system activation, trickle charges the batteries during standby modes, and supplies power to siren /PA unit during operation.
Rotor Control Module: Receives input from the decoder and tone generator and controls the siren's rotation (oscillation, direction commands and breaking).
ENCODER Addressing The Big Rock Public Warning System encoder is an electronic device capable of addressing up to 10,000 individual siren /PA units in addi-tion to the selection of up to 10 functions at each location.
The encoded signal is comprised of a series of six digits of which the first four are the address code of ths selected remote stations. Each siren /PA station must receive its preassigned address code in the proper sequence. For example, if the decoder address code is 2503, the i
first digit, the number two, must be received first, then the five, the l
zero, and then the three.
If the address code is sent out of order, the decoder will reject it.
The fifth digit is a preprogrammed control digit designed to permit special addressing functions; ie, selective status board activation. If the fifth digit is incorrect, the address will be rejected. The sixth digit is the command function which l
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Prompt Notification System-BRP 10 controls the operational mode of the equipment; ie, Public Warning Siren or PA.
Up to 10 different operational modes may be selected ty momentary push-button switches.
To make the encoder more flexible, an all-call number can be substi-tuted for each digit in the address. The address is selected by means of four thumb-wheel switches on the encoder. Each switch has 11 positions, O to 11.
Position 11 is used as the all-call number.
If all four switches were placed in 11-11-11-11, all stations would respond to this address.
If the switches were set up for 2-5-0-11, all those stations that have an address with the first three numbers of 250 would respond.
If the switches were set up for 2-11-0-11, all stations that have a 2 for the first digit and a O for the third digit of the address would respond. The rest of the stations would not respond be-cause of an invalid address. By using the substitute number, the stations can be selected, by group, or may be selected by transmitting a single command. Various combinations can be used depending upon the size and geographical layout of the system. Figures IA through ID illustrate different address combinations that permit the selection of different siren /PA unit combinations.
(These examples differ slightly from the Big Rock Public Warning System layout.)
(Fig 1A) shows a system that is divided into 7 sections, each being i
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Prompt Notifice. tion System-BRP yy is assigned to a station located in a segment. There can be up to 10 remote stations in any segment.
(Fig 1A) shows the address code to access a single station. Station Number 3 located in Segment 8 of Section 13 is identified. The first two address switches are set for 13, the section desired. The third address switch is set for 8, the segment desired. The fourth address switch is set for 3, the station desired. The address switches on the encoder should now read 1-3-8-3.
This will access only that station.
If a whole segment is' desired, the last number is substituted with a Number 11 on the address switch.
Also shown in (Fig 1A) is the selection of one segment. The fourth segnent in Section 22 is desired and all stations assignad to that segment. The encoder address switches are set to read 2-2-2-11 The first two digits are the section desired. The third digit is the segment desired. The fourth digit is an 11, so all stations in that segment will be accessed.
(Fig IB) illustrates the selection of a section and a trisection of the system.
In selecting a section (ie, 13), the first two digits of the address code are set for 1-3.
The third and fourth digit numbers are substituted with the Number 11.
Thus, the address code to select all stations in Section 13 is 1-3-11-11.
In selecting a trisection of the system (ie, 2), the first digit of the address is set for.3, the third trisection. The remaining three digits of the address are set with the ma1281-0373a-87-42
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Prompt Notification System-BRP 12 Number 11 or all call. The address now reads 3-11-11-11.
All stations in the second trisection will now be accessed.
The system can also be accessed in a 16-segment (annulus) of a 3-segment basis.
(Fig IC) illustrates this selection.
All stations in a system may be accessed by substituting the Number 11 for all address numbers. By programming the address code switches with the numbers 11-11-11-11, all stations will be accessed (Fig ID).
Command Functions Ten momentary push-button switches on the encoder control the opera-tional mode of the system. These switches alter the sixth digit of the encoder signal and are designated as follows:
Tape: Sends a " clear" signal to all siren units addressed, initiates the tape player (only used with prerecorded activation tapes), and places the cassette player in control of the entire system.
PA (Public Address): Places all siren units addressed into the Public Address Mode. Activates all public warning receivers.
LOC ALT (Local Alert): Places all siren units addressed into the Local Alert Siren Mode. Sirens will produce a "hi-lo" siren sound and the unit will oscillate. Does not affect public warning receivers.
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i 13 Prompt Hotification System-BRP PUB WRN (Public Warning): Places all siren units addressed into the Public Warning Siren Mode. Sirens will produce a steady siren sound and units will oscillate. Does not affect public warning receivers.
NAT ATK (National Attack): Places all siren units addressed into the National Attack Siren Mode. Sirens will provide a " wail" siren sound and units will oscillate. Does not affect public warning receivers.
HOME STAT (Home/ Control Center Status): This is a two-function switch that commands the addressed units to home positions;*
activates control center indication light (the system status display on the status mapboard) when the correct control center address is entered.
90' Commands all siren units addressed to rotate to the 90*
position which is 90' clockwise from the home position. Does not affect public warning receivers.
180*: Commands all siren units addressed to rotate to the 180*
position which is 180* clockwise from the home position. Does not affect public warning receivers.
270*: Commands all siren units addressed to rotate to the 270*
position which is 270' clockwise from the home position. Does not affect public warning receivers.
- Home position is defined as 90' clockwise from a line pointing away from the nuclear power plant and through the siren site in question. Home position is not the same for all units nor is it geographic north (see Appendix E).
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Prompt Notification System-BRP 14 CLR (Clear): Places all siren units addressed in the standby mode.
Clears all previous commands to addressed siren units. Does not affect public warning receivers.
Each of the above 10 command functions supersede any prior commands.
If " PUB %GLN" is sent to a siren unit followed by a "270'," the siren unit will enter "FUB WRN" mode, clear and rotate to 270' and shut down.
CASSEI7I PLAYER The cassette player is used in conjunction with the activation tapes.
Once an activation tape has been properly loaded into the player (see Section 4.3.1) and the cassette player " PLAY" button is depressed, the cassette player is controlled by the encoder.
(NOTE: The cassette player will not start until " TAPE" and double " SEND" (or " PRE CHK") is entered into the encoder.)
NOTES:
The " PAUSE," " RECORD," " REVIEW," and " CUE" controls have been locked and are not functional.
The cassette player volume control should be adjusted to a normal listening level. This control does not affect the actual siren /PA levels.
The cassette player door should be closed when not in use to prevent dust and dirt from entering the player's mechanism.
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- Do not store activation tapes in the cassette player. Activation tapes must be placed in their correct cases and stored in the correct cassette tray slot when not in use.
Cassette player maintenance will be performed"by Consumers Power Company. Do not attempt to clean the player.
The. cassette player is designed for use with the Public Warning Sys-tem only. It will not function as a normal cassette player.
It will not record activation tapes, nor can it erase tapes.
Activation Tapes The Public Warning System Control Center is equipped with prerecorded activation tapes. Each tape is programmed for a certain siren function:
- System Demonstration (White)
Presents system capabilities and functions through the status map-board and instructional audio track. The demonstratien is performed in the precheck mode.
- Monthly Test (Black)
Used for monthly tests of the Public Warning System. Activates all sirens and public warning receivers in system and includes "Public Warning" signal and "PA" function tests (see 6.1).
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- Tornado Warning (Yellow)
Used for notifying th'e public of a tornado warning (funnel cloud or tornado actually sighted). Activates all sirens and public warning receivers in the system.
- Severe Weather Warning (Blue)
Used for notifying the public of a severe weather warning (severe weather imminent). Activates all sirens and public warning receivers in the system.
- Local Alert (Green)
For use in the event of a local emergency (train derailment, gas leaks, fires, etc).
Nuclear Emergency (Orange)
Used in the event of a nuclear-related emergency. Activates _all si-rens and public warning receivers in the system.
- National Attack (Red)
Used in the event of a national attack. Activates all sirens and warning receivers in the system.
Each tape is recorded on both sides and contains all signalling needed to produce the given warning. Arrows printed on the tape leader indi-cate the correct loading position. Arrows must point upward when the activation tape is loaded into the cassette player.
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r Prompt Notification System-BRP 37 WARNING:
IF TAPES ARE LOADED WITH ARROWS POINTING DOWN, TE PUBLIC VARNING SYSTEM VILL NOT ACTIVATE.
If arrows are not visible, insert a pen into the cassette hub and gently wind tape onto the supply reel (reel with most tape). Tapes are cut to minimum length so rewinding tapes after use is a required.
CAUTION: DO NOT EXPOSE TE ACTIVATION TAPES TO EAT, EXCESSIVE SUN-LIGHT OR MAGNETIC FIELDS.
ALWAYS RETURN TE TAPES TO THEIR CASES AND STORE THEM IN TE CASSETTE TRAY WEN NOT IN USE.
DO NOT LEAVE ACTIVATION TAPES IN THE CASSETTE PLAYER.
STATUS MAPBOARD The status mapboard is designed to display the status of each siren /PA unit. Light assemblies to the rear of the Plexiglass sandwiched, Mylar mapboard identify the geographic location of each siren /PA unit. Each t
of the siren /PA light assemblies consists of four different colored lamps that identify the different siren /PA functions:
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GREEN - Local Alert Siren Mode EkANGE-PublicWarningSirenMode 1
J LEED - National Attack Siren Mode i
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When a specific siren /PA address / function is transmitted, the corresponding map lights on both Control Center status map boards are activated. This identifies to each Control Center that specific
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When the operational mode is changed, the status light color will change for each siren /PA location. At the end of the system activation i
all status lights will extinguish with the transmission of a "CLR" -
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" SEND" signal.
The transmission of a precheck signal from an encoder will activate only the lamps on the status board of the initiating Control Center.
This allows a check of encoder operation and provides a visual indication of the entered address.
System status is displayed in the upper left of the status mapboard.
Should a Control Center be unable to activate the system, the transmis-
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sion of the Control Center status code will activate the specific Control Center status light on all status mapboards. The light will remain activated until cleared by the initiating agency.
f The " activation" light is located above the Control Center status lights. This light is on whenever_the Control Center transmitter is
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l Prompt Notification System-BRP 19 keyed by the encoder. THIS LIGHT SHOULD NOT BE ON DURING ROUTINE (NON-WARNING SYSTEM) RADIO TRAFFIC. THE LIGHT SHOULD NOT BE ON DURING PRECHECK.
When the warning system is under the control of an activation tape (in l
" SEND" mode and not " PRE CHK"), the activation light will remain on until the activation tape is complete and "RST" is pressed. When the warning system is in manual mode, the activation light will remain on only for short periods of time (for data burst transmission snd voice messages).
Below the system status display is the " Rotating Siren Position" star.
This star indicates the last position command which was issued to the unit. The star also displays the oscillation sequence. The " Rotating Siren Position" star is referenced in degrees; "Home" position at the top, 180' at the bottom, etc.
PUBLIC VARNING RECEIVERS The Public Warning System incorporates public warning receivers in locations of high ambient noise levels. Each receiver is activated automatically by the Public Warning System during these activation tapes only:
National Attack Warning (Red)
Nuclear Emergency (Orange)
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Prompt Notification System-BRP 20 Severe Weather Warning (Blue)
- . Monthly System Test (Black)
Several public warning receivers turn on external alerting devices that operate from a 120 V ac power source. The receivers, however, function normally on built-in battery power during power outages.
The initiating Control Center will broadcast specific geographic infor-mation and radio station identification over the public warning receiv-ers during the period of actual siren operation.
Additional information describing the type of warning will be simulta-neously broadcast over the public address system and the public warning receivers when the siren /PA units are in the PA mode.
A specific set of operating instructions is included with the warning receivers and is presented in Appendix D along with public warning receiver liability forms and a receiver location list.
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