GO2-86-218, Confirms Commitments Made During 860306 Conference Call Re Evacuation Warning in High Noise Areas.Alerting Devices & Strobe Light/Siren Sys Will Be Installed by 860917,as First Phase of Acoustic Study

Confirms Commitments Made During 860306 Conference Call Re Evacuation Warning in High Noise Areas.Alerting Devices & Strobe Light/Siren Sys Will Be Installed by 860917,as First Phase of Acoustic Study

ML20140E978
Person / Time
Site:	Columbia
Issue date:	03/14/1986
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Martin J, Temple G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20140E975	List: GO2-86-218, Confirms Commitments Made During 860306 Conference Call Re Evacuation Warning in High Noise Areas.Alerting Devices & Strobe Light/Siren Sys Will Be Installed by 860917,as First Phase of Acoustic Study ML20140E970
References
GO2-86-218, NUDOCS 8603280254
Download: ML20140E978 (5)

Text

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C Washington Public Power Supply System P.O. Box 968 3000 GeorgeWashingtonWay Richland, Washington 99352 (509)372-5000 Docket No. 50-397 March 14, 1986 G02-86-218 si s.

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Mr. J. B. Martin G

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Regional Administrator e

U. S. Nuclear Regulatory Commission

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1450 Maria Lane, Suite.210 a

Walnut Creek, California 94596 ATTEtTION: Ms. Gail Temple

SUBJECT:

NUCLEAR PLANT N0. 2 EVACUATION WARNING IN HIGH NOISE AREAS

REFERENCES:

1)

Telephone Conference call, Mr. Ross Scarano, et. al.,

with Mr. Chris Powers, et. al., December 11, 1985, same subject.

2)

Telephone Conference Call, Mr. Ross Scarano, et. al.,

with Mr. Jack Shannon, et. al., February 12, 1986, same subject.

3)

Letter, G02-85-734, G. C. Sorensen to J. B. Martin, entitled " Evacuation Warning in High Noise Areas",.

dated October 23, 1985.

This letter confirms commitments made during our conference call with Mr. Ross Scarano and others of your staff on March 6,1986,'and contains infonnation that we provided at that time.

As we had outlined in the first telephone conversation (12/11/85), we have.

completed the first phase of the acoustic study to detennine the need for notification improvements. We have identified eleven (11) locations where augmenting alerting devices should be placed.

In ' addition, we have com-pleted a conceptual design specification for a portable (cart mounted) radio, tone-activated, strobe light / siren system to be placed in those locations where the noise levels exceed 100 db. A request for' proposal to supply these devices has been released to prospective suppliers.

We antic-ipate letting a contract by early April. At this point, we anticipate a ten (10) week delivery for this equipment, which places them here in June.

We.would further expect that receipt inspection, installation, and functional testing would occur in June and July.

Employee training program. revisions, emergency procedure updates, and company notification activities would occur in parallel with the. installation and functional testing. As'we discussed in our October 1985 letter, based upon our significant progress since 8603200254 860324 PDR ADOCK 05000397 G

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Mr. J. B. Martin Page 2 December, we can now more firmly establish a connitment date for completion of these initiatives. We will complete this work prior to_ September 17, 1986, so that the units will be operational and can be tested during the Annual Emergency Exercise which is scheduled on that date.

During our upcoming outage, we will complete the second phase of our acoustic survey to determine if there are additional areas.where strobes need to be placed. This second survey will more adequately cover high radiation areas and will provide data on other Plant operating modes with which.to judge the adequacy of our location selections.

Some adjustment in both the number and/or locations of strobes would be expected.

This schedule does not include the placement of units identified in the second survey, but they will be installed at the earliest opportunity.

Attached are the specifications for the alerting devices we have developed.

If you have additional questions or concerns, please contact Mr. R.. A. -Chitwood 4

at (509) 377-8466.

Very truly yours, d5 G. C.

orensen, Manager Regulatory Programs GCS/RAC/vic Attachment cc: J0 Bradfute - NRC E Revell - BPA C Esheles - EFSEC R Fish - NRC Region V RC Barr - NRC Site l

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s PORTABLE HIGH NOISE AREA PERSONNEL EVACUATION SYSTEM System Description and Specifications The system will be comprised of an equipment cart mounted, radio activated, speaker amplifier / tone generator, and strobe lamp. A suitable UPS power supply with charger and testing facilities shall be included.

The end result being a device which can be temporarily or permanently moved into an area, plugged into convenient AC power and activated by radio signalling.

This design concept eliminates the requirement for expensive plant modifi-cations to support a hardwired system.

A more detailed description of system specifications follows:

a.

Equipment Cart - A Dayton M/N SC5000 equipment cart or approved equal should be used to house all system components for the notification defice. The upper shelf of the cart should contain strobe lamp, speaker, radio antenna, and cancel switch as appropriate.

The lower shelf should house the _ tone generator, system power source, speaker amplifier, and receiver / decoder systems, effectively locating the heavier components close to ground level and maintaining a stable equipment cart.

The bottom portion of the cart should have hinged side panels offering easy maintenance access and preventing casual tampering.

b.

Audio Amplifier / Speaker - An audio amplifier speaker combination should be provided which is capable of producing an on-axis sound pressure level of 125 db at ten feet when driven by tones from the tone generator system.

The mounting of the speaker assembly may incorporate a position for the strobe lamp as appropriate so as not to interfere with the strobe's 360 degree coverage.

The speaker location itself should provide an approx-imate 90 degree area of coverage and may be oriented by moving the equip-ment cart. The audio output level of the amplifier should be adjustable from within the enclosure or amplifier, by technical personnel.

High Brightness Strobe Lamp - A Whelen " Super Strobe 360" or equivalent, c.

equipped with clear shatter-proof lens should be mounted atop the cart.

Mounting shall assure a 360-degree viewing angle.

The Xenon flash tube and associated power supply should be easily field replaceable.

d.

Tone Generator - A tone generator capable of producing the following tones when actuated by control circuitry shall be provided and feed audio to the speaker amplifier system.

Tone A - SIREN: Audio frequency of 500-1000 Hz, modulation rate of three seconds per cycle.

Tone B - PULSE: Audio frequency of 475 Hz + 25 Hz, modulation rate of 4.5 Hz.

These tones are meant to duplicate those now in use, which are gen-erated by a Gaitronic M/N 355 Multi-Tone Generator.

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Local Cancel Switch - A button or switch mounted on the equipment cart shall be provided to stop the audio amplifier / tone generator locally.

The strobe lamp shall continue to flash' until reset by remote control.

The switch should be. mounted conveniently but not be susceptible to accidental actuation.

f.

Radio Control Link - Each equipment cart should be equipped with a radio receiver. and. 5 db gain antenna capable of operation in the VHF band at a frequency of 451.225 Mhz. The receiver should be a REPC0 819 series or General Electric DL-100 Data Link.

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The antenna'should be a MAXRAD MUF-450 series 5 db gain Collinear or a proved equal. Antenna mounting should be such as to allow a maximum romni-directional receive pattern as obtainable in this configuration.

The radio link receivers will operate on the existing _ plant repeater system frequency for optimal coverage inside the plant.

g.

Encoder / Decoder Control System - The. activation and Cancel functions of the Audio / Strobe lamp system will use a Multi-Level DTMF signalling system of current reliable manufacture. The format used must be extremely reliable and highly insensitive to false activation.

Three control functions minimum shall' be provided and be interlocked such that only one at a time may be active.

1 - TONE A/STR0BE LAMP Activate 2 - TONE B/STR0BE LAMP Activate 3 - CANCEL - Turn off tones and strobe and reset system These commands must be sent as an "ALL CALL" function and be decoded by all notificction devices essentially simultaneously.

The system should, however, have the ability (through minor modification) to be activated in a Selective GROUP or INDIVIDUAL mode.

The encoder device must interface with existing Supply System General Electric MASTR 11 Repeater station equipment at the 600 ohm level.

It must have adjustable modulation level and a high enough output impedance not to load the 600 chm line. The selection of encoded function and the activation of the encoder will be accomplished through a form "C" con-tact closure for each function. Supply System personnel will provide the interface wiring to appropriate relay contacts.. Regulated 12 volt nominal DC power is available for encoder.

Detailed. descriptions of the required interface is necessary to assure proper operation of the system.

The decoders will interface to the Receive Radio Link installed'on each-equipment cart.

Control functions will be initiated through contact closure or transistor action.

If possible,' local activation of each control function should be available for technical personnel. m

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