Information Notice 1996-19, Failure of Tone Alert Radios to Activate When Receiving a Shortened Activation Signal: Difference between revisions

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{{#Wiki_filter:'SeUNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR REACTOR REGULATIONWASHINGTON, D.C. 20555-0001April 2, 1996NRC INFORMATION NOTICE 96-19: FAILURE OF TONE ALERT RADIOS TO ACTIVATE WHENRECEIVING A SHORTENED ACTIVATION SIGNAL
{{#Wiki_filter:'Se UNITED STATES NUCLEAR REGULATORY
 
COMMISSION
 
===OFFICE OF NUCLEAR REACTOR REGULATION===
WASHINGTON, D.C. 20555-0001 April 2, 1996 NRC INFORMATION
 
NOTICE 96-19: FAILURE OF TONE ALERT RADIOS TO ACTIVATE WHEN RECEIVING
 
A SHORTENED
 
ACTIVATION
 
SIGNAL


==Addressees==
==Addressees==
All holders of operating licenses or construction permits for nuclear powerreactors.PurgoseThe U.S. Nuclear Regulatory Commission (NRC) is issuing this informationnotice to alert addressees to the possibility that tone alert radios may notreliably activate when receiving a shortened activation signal. It isexpected that recipients will review the information for applicability totheir facilities and consider actions, as appropriate, to avoid similarproblems. However, suggestions contained in this information notice are notNRC requirements; therefore, no specific action or written response isrequired.
All holders of operating
 
licenses or construction
 
permits for nuclear power reactors.Purgose The U.S. Nuclear Regulatory
 
Commission (NRC) is issuing this information
 
notice to alert addressees
 
to the possibility
 
that tone alert radios may not reliably activate when receiving
 
a shortened
 
activation
 
signal. It is expected that recipients
 
will review the information
 
for applicability
 
to their facilities
 
and consider actions, as appropriate, to avoid similar problems.
 
However, suggestions
 
contained
 
in this information
 
notice are not NRC requirements;  
therefore, no specific action or written response is required.Description
 
of Circumstances
 
In a report made pursuant to Section 50.72(b)(1)(v)
of Title 10 of the Code o Federal Regulations
 
(10 CFR 50.72(b)(1)(v)), Event Number 29907, dated January 30, 1996, the licensee for the Callaway site reported a problem with tone alert radios. During a test of the Emergency
 
Alert System (EAS), a radio station engineer observed that a tone alert radio receiver did not activate.An investigation
 
by the licensee found that the length of the broadcast activation
 
signal was insufficient
 
to reliably activate the tone alert radio receiver model in use at the radio station. The broadcast
 
duration of the activation
 
signal had been reduced from 20 seconds to 8 seconds as permitted by current Federal Communications
 
Commission (FCC) regulations.
 
The radio station restored the duration of the activation
 
signal broadcast
 
to the original 20-second
 
length and observed that the tone alert radio receiver activated
 
as expected.Discussion
 
Section 50.47(b)(5)
of 10 CFR requires emergency
 
response plans for nuclear power reactors to include a means of providing
 
early notification
 
and clear instruction
 
to the populace within the plume exposure pathway emergency planning zone (EPZ) in the event of an emergency.
 
Many nuclear power reactor sites have integrated
 
tone alert radios into alert and notification
 
systems used to notify and provide instructions
 
to members of the general public near the site during emergency
 
situations.
 
t$DR~~~~ If aeq 0n 9Goc 9603270127
1\ -
% i KY-2 IN 96-19 April 2, 1996 These radios may serve as supplements
 
to a siren system by filling in voids in siren coverage, or they can be the principal
 
means of notifying
 
the EPZ population.
 
Tone alert radio receivers
 
are used in conjunction
 
with the EAS.On December 28, 1994, the FCC issued a Report and Order (59 FR 67090)concerning
 
the Emergency
 
Broadcast
 
System (EBS). This Report and Order replaced the EBS with what is now known as the EAS. This change allowed for the creation of a new generation
 
of alerting equipment
 
embracing
 
digital technology.
 
The change also modified some of the old EBS requirements.
 
One of the changes permits the use of a shorter duration tone activation
 
signal to activate tone alert radio receivers.
 
This change may have decreased
 
the reliability
 
of some tone alert radios currently
 
in use to activate when required.Before July 1, 1995, the broadcast
 
duration of the signal that activates
 
tone alert radios was required to be between 20 and 25 seconds. After July 1, 1995, the broadcast
 
duration of the signal that activates
 
tone alert radios was permitted
 
to be between 8 and 25 seconds. The FCC encourages
 
the use of the longer (up to 25 seconds) tone during emergencies.
 
Tone alert radio receivers
 
are, and have been, available
 
from various manufacturers
 
for several years. Depending
 
on the specifications
 
provided by the purchaser, the threshold
 
for activation
 
has been built into receivers.
 
The signal duration needed for some tone alert radio receiver models may be longer than the currently
 
approved 8-second minimum signal duration now allowed by FCC regulations.
 
The FCC regulations
 
permit individual
 
radio stations to select the duration of the activation
 
signal they broadcast, provided it is within the limits of 8 to 25 seconds. To reliably activate a tone alert radio receiver the duration of the activation
 
signal broadcast
 
by the radio station must be long enough to meet the activation
 
threshold
 
built into tone alert radio receivers
 
in service in a particular
 
reception
 
area. If the duration of the activation
 
signal broadcast
 
is not compatible
 
with the threshold
 
set in a receiver, the reliability
 
of the receiver response is questionable.
 
Either the duration of the activation
 
signal broadcast
 
or the threshold
 
for activation
 
built into receivers
 
may need to be modified to ensure compatibility.
 
i N' '' IN 96-19 April 2, 1996 This Information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact one of the technical
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Den4 o. Cru e , Director Division of Reactor Project Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl~nrc.gov
 
J. L. Birmingham, NRR (301) 415-2829 Internet:lb4@nrc.gov
 
Attachment:
List of A b1~f;ilivJ-
Recently Issued NRC Information
 
Notices%b eo
 
Attachment
 
IN 96-19 April 2, 1996 LIST OF RECENTLY ISSUED NRC INFORMATION
 
NOTICES Information
 
Date of Notice No. Subject Issuance Issued to 96-18 95-03 Supp. 1 96-17 96-16 Compliance
 
with 10 CFR Part 20 for Airborne Thorium Loss of Reactor Coolant Inventory
 
and Potential Loss of Emergency
 
Mitiga-tion Functions
 
While in a Shutdown Condition Reactor Operation
 
Incon-sistent with the Updated Final Safety Analysis Report BWR Operation
 
with Indicated
 
===Flow Less Than Natural Circulation===
Unexpected
 
Plant Perform-ance During Performance
 
of New Surveillance
 
Tests Degradation
 
of Radwaste Facility Equipment
 
at Millstone
 
Nuclear Power Station, Unit 1 Potential
 
Containment
 
Leak Paths Through Hydrogen Analyzers Control Rod Insertion Problems 03/25/96 03/25/96 03/18/96 03/14/96 03/08/96 03/01/96 02/26/96 02/15/96 All material licensees authorized
 
to possess and use thorium in unsealed form All holders of OLs or CPs for PWR power plants All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for boiling-water
 
reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors 96-15 96-14 96-13 96-12 OL = Operating
 
License CP = Construction
 
Permit
 
IN 96-xx March xx, 1996 This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact one of the technical
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Project Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl~nrc.gov
 
J. L. Birmingham, NRR (301) 415-2829 Internet:jlb4@nrc.gov
 
Attachment:
List of Recently Issued NRC Information
 
Notices* See previous concurrence
 
OFFICE PERB:DRPM:NRR
 
SC/PERB:DRPM
 
I C/PERB:DRPM:NRR
 
NAME DMBarss* THEssig* CLMiller*I DATE 03/18/96 03/18/96 I 03/18/96 OFFICE TECHED:RPB
 
PECB:DRPM:NRR
 
C/PECT.VPM.?NRR
 
D/DRPM:HRR
 
NAME BCalure* l JBirmingham*
 
===AEChaffJ DMCrutchfield===
DATE I03/ /96 03/21/96 03/a2/96 V0! 03/ /96.rrt -t~~s e rserl swur 1.w -ntn^ *a.PlrIULAL WULUiILFI
 
wAML: b: JLL1 I\UNLALKI.1N
 
IN 96-xx March xx, 1996 This information
 
notice requires no specific action or written response.
 
If you have any questions
 
about the information
 
in this notice, please contact one of the technical
 
contacts listed below or the appropriate
 
Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Project Management
 
===Office of Nuclear Reactor Regulation===
Technical
 
contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl@nrc.gov
 
J. L. Birmingham, NRR (301) 415-2829 Internet:jlb4@nrc.gov
 
Attachment:
List of Recently Issued NRC Information
 
Notices 11 5 ?ee-e a 4jo&5 Cti4et- A4J-t.OFFICE PERB:DRPM:NRR
 
SC/PERB:DQPM
 
C/PERB:DRPNRR
 
NAME DMBarss Z&N 6 THEssig 1& J MWller l_ _ _ are __ _= .. .-_I_ .DATE 03/IJ/96 j 03/0TV/96 l 03I%'iI96 J OFFICE TECHED:RPB
 
PECB:DRPM:NRR
 
C/PECB:DRPM:NRR
 
D/DRPM:NRR
 
NAME 1 JBirmingham
 
-AEChaffee
 
===DLCrutchfield===
DATE I03/'t /96 1031&'196/4
03/ /96 103/ A96 O DUMT N--E: : _ _ -._. ..OFFICIAL DOCUMENT NAME: G:.\MLMUS\1UNLALK1.1N
 
OFFICE PERB:DRPM:NRR
 
SC/PERB:DRPM
 
C/PERB:DRPM:NRR


==Description of Circumstances==
NAME DMBarss THEssig CLMiller.DATE 03/ /96 03//96 03/ /96 OFFICE TECH PECB:DRPM:NRR
In a report made pursuant to Section 50.72(b)(1)(v) of Title 10 of the Code oFederal Regulations (10 CFR 50.72(b)(1)(v)), Event Number 29907, datedJanuary 30, 1996, the licensee for the Callaway site reported a problem withtone alert radios. During a test of the Emergency Alert System (EAS), a radiostation engineer observed that a tone alert radio receiver did not activate.An investigation by the licensee found that the length of the broadcastactivation signal was insufficient to reliably activate the tone alert radioreceiver model in use at the radio station. The broadcast duration of theactivation signal had been reduced from 20 seconds to 8 seconds as permittedby current Federal Communications Commission (FCC) regulations. The radiostation restored the duration of the activation signal broadcast to theoriginal 20-second length and observed that the tone alert radio receiveractivated as expected.DiscussionSection 50.47(b)(5) of 10 CFR requires emergency response plans for nuclearpower reactors to include a means of providing early notification and clearinstruction to the populace within the plume exposure pathway emergencyplanning zone (EPZ) in the event of an emergency. Many nuclear power reactorsites have integrated tone alert radios into alert and notification systemsused to notify and provide instructions to members of the general public nearthe site during emergency situations.t$DR~~~~ If aeq 0n 9Goc96032701271\ -
% iKY-2 IN 96-19April 2, 1996 These radios may serve as supplements to a siren system by filling in voids insiren coverage, or they can be the principal means of notifying the EPZpopulation. Tone alert radio receivers are used in conjunction with the EAS.On December 28, 1994, the FCC issued a Report and Order (59 FR 67090)concerning the Emergency Broadcast System (EBS). This Report and Orderreplaced the EBS with what is now known as the EAS. This change allowed forthe creation of a new generation of alerting equipment embracing digitaltechnology. The change also modified some of the old EBS requirements. Oneof the changes permits the use of a shorter duration tone activation signal toactivate tone alert radio receivers. This change may have decreased thereliability of some tone alert radios currently in use to activate whenrequired.Before July 1, 1995, the broadcast duration of the signal that activates tonealert radios was required to be between 20 and 25 seconds. After July 1,1995, the broadcast duration of the signal that activates tone alert radioswas permitted to be between 8 and 25 seconds. The FCC encourages the use ofthe longer (up to 25 seconds) tone during emergencies.Tone alert radio receivers are, and have been, available from variousmanufacturers for several years. Depending on the specifications provided bythe purchaser, the threshold for activation has been built into receivers.The signal duration needed for some tone alert radio receiver models may belonger than the currently approved 8-second minimum signal duration nowallowed by FCC regulations.The FCC regulations permit individual radio stations to select the duration ofthe activation signal they broadcast, provided it is within the limits of 8 to25 seconds. To reliably activate a tone alert radio receiver the duration ofthe activation signal broadcast by the radio station must be long enough tomeet the activation threshold built into tone alert radio receivers in servicein a particular reception area. If the duration of the activation signalbroadcast is not compatible with the threshold set in a receiver, thereliability of the receiver response is questionable. Either the duration ofthe activation signal broadcast or the threshold for activation built intoreceivers may need to be modified to ensure compatibility.


i N' '' IN 96-19April 2, 1996 This Information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactone of the technical contacts listed below or the appropriate Office ofNuclear Reactor Regulation (NRR) project manager.Den4 o. Cru e , DirectorDivision of Reactor Project ManagementOffice of Nuclear Reactor RegulationTechnical contacts:D. M. Barss, NRR(301) 415-2922Internet:dmbl~nrc.govJ. L. Birmingham, NRR(301) 415-2829Internet:lb4@nrc.govAttachment: List ofA b1~f;ilivJ-Recently Issued NRC Information Notices%b eo
C/PECB:DRPM:NRR


AttachmentIN 96-19April 2, 1996 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to96-1895-03Supp. 196-1796-16Compliance with 10 CFRPart 20 for AirborneThoriumLoss of Reactor CoolantInventory and PotentialLoss of Emergency Mitiga-tion Functions While in aShutdown ConditionReactor Operation Incon-sistent with the UpdatedFinal Safety AnalysisReportBWR Operation withIndicated Flow Less ThanNatural CirculationUnexpected Plant Perform-ance During Performanceof New Surveillance TestsDegradation of RadwasteFacility Equipment atMillstone Nuclear PowerStation, Unit 1Potential ContainmentLeak Paths ThroughHydrogen AnalyzersControl Rod InsertionProblems03/25/9603/25/9603/18/9603/14/9603/08/9603/01/9602/26/9602/15/96All material licenseesauthorized to possess anduse thorium in unsealedformAll holders of OLs or CPsfor PWR power plantsAll holders of OLs or CPsfor nuclear power reactorsAll holders of OLs or CPsfor boiling-water reactorsAll holders of OLs or CPsfor nuclear power reactorsAll holders of OLs or CPsfor nuclear power reactorsAll holders of OLs or CPsfor nuclear power reactorsAll holders of OLs or CPsfor nuclear power reactors96-1596-1496-1396-12OL = Operating LicenseCP = Construction Permit
D/DRPM:NRR


IN 96-xxMarch xx, 1996 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactone of the technical contacts listed below or the appropriate Office ofNuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, DirectorDivision of Reactor Project ManagementOffice of Nuclear Reactor RegulationTechnical contacts:D. M. Barss, NRR(301) 415-2922Internet:dmbl~nrc.govJ. L. Birmingham, NRR(301) 415-2829Internet:jlb4@nrc.govAttachment:List of Recently Issued NRC Information Notices* See previous concurrenceOFFICE PERB:DRPM:NRR SC/PERB:DRPM I C/PERB:DRPM:NRRNAME DMBarss* THEssig* CLMiller*IDATE03/18/9603/18/96I03/18/96OFFICE TECHED:RPB PECB:DRPM:NRR C/PECT.VPM.?NRR D/DRPM:HRRNAME BCalure* l JBirmingham* AEChaffJ DMCrutchfieldDATE I03/ /96 03/21/96 03/a2/96 V0! 03/ /96.rrt -t~~s e rserl swur 1.w -ntn^ *a.PlrIULAL WULUiILFI wAML: b: JLL1 I\UNLALKI.1N
NAME 4 JBirmningham


IN 96-xxMarch xx, 1996 This information notice requires no specific action or written response. Ifyou have any questions about the information in this notice, please contactone of the technical contacts listed below or the appropriate Office ofNuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, DirectorDivision of Reactor Project ManagementOffice of Nuclear Reactor RegulationTechnical contacts:D. M. Barss, NRR(301) 415-2922Internet:dmbl@nrc.govJ. L. Birmingham, NRR(301) 415-2829Internet:jlb4@nrc.govAttachment:List of Recently Issued NRC Information Notices11 5 ?ee-e a 4jo&5 Cti4et- A4J-t.OFFICE PERB:DRPM:NRR SC/PERB:DQPM C/PERB:DRPNRRNAME DMBarss Z&N 6 THEssig 1& J MWller l_ _ _ are __ _= .. .-_I_ .DATE 03/IJ/96 j 03/0TV/96 l 03I%'iI96 JOFFICE TECHED:RPB PECB:DRPM:NRR C/PECB:DRPM:NRR D/DRPM:NRRNAME 1 JBirmingham -AEChaffee DLCrutchfieldDATE I03/'t /96 1031&'196/4 03/ /96 103/ A96O DUMT N--E: : _ _ -._. ..OFFICIAL DOCUMENT NAME:G:.\MLMUS\1UNLALK1.1N
AEChaffee


OFFICE PERB:DRPM:NRR SC/PERB:DRPM C/PERB:DRPM:NRRNAME DMBarss THEssig CLMiller.DATE03/ /9603//9603/ /96OFFICE TECH PECB:DRPM:NRR C/PECB:DRPM:NRR D/DRPM:NRRNAME 4 JBirmningham AEChaffee DLCrutchfieldDATE 03//P96 03/ /96 03/ /96 03/ /96-.r .I .rl., , nu n ... uuS e -t. * .lr 4- AI .t ValUrlWlAL UULUMtNI NAML:b: FILMUZO\ I URALK I. I *  
===DLCrutchfield===
}}
DATE 03//P96 03/ /96 03/ /96 03/ /96-.r .I .rl., , nu n ... uuS e -t. * .lr 4- AI .t Val UrlWlAL UULUMtNI NAML: b: FILMUZO\ I URALK I. I *}}


{{Information notice-Nav}}
{{Information notice-Nav}}

Revision as of 14:04, 31 August 2018

Failure of Tone Alert Radios to Activate When Receiving a Shortened Activation Signal
ML031060187
Person / Time
Site: Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant  Entergy icon.png
Issue date: 04/02/1996
From: Crutchfield D M
Office of Nuclear Reactor Regulation
To:
References
IN-96-019, NUDOCS 9603270127
Download: ML031060187 (7)
v • d • e


'Se UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555-0001 April 2, 1996 NRC INFORMATION

NOTICE 96-19: FAILURE OF TONE ALERT RADIOS TO ACTIVATE WHEN RECEIVING

A SHORTENED

ACTIVATION

SIGNAL

Addressees

All holders of operating

licenses or construction

permits for nuclear power reactors.Purgose The U.S. Nuclear Regulatory

Commission (NRC) is issuing this information

notice to alert addressees

to the possibility

that tone alert radios may not reliably activate when receiving

a shortened

activation

signal. It is expected that recipients

will review the information

for applicability

to their facilities

and consider actions, as appropriate, to avoid similar problems.

However, suggestions

contained

in this information

notice are not NRC requirements;

therefore, no specific action or written response is required.Description

of Circumstances

In a report made pursuant to Section 50.72(b)(1)(v)

of Title 10 of the Code o Federal Regulations

(10 CFR 50.72(b)(1)(v)), Event Number 29907, dated January 30, 1996, the licensee for the Callaway site reported a problem with tone alert radios. During a test of the Emergency

Alert System (EAS), a radio station engineer observed that a tone alert radio receiver did not activate.An investigation

by the licensee found that the length of the broadcast activation

signal was insufficient

to reliably activate the tone alert radio receiver model in use at the radio station. The broadcast

duration of the activation

signal had been reduced from 20 seconds to 8 seconds as permitted by current Federal Communications

Commission (FCC) regulations.

The radio station restored the duration of the activation

signal broadcast

to the original 20-second

length and observed that the tone alert radio receiver activated

as expected.Discussion

Section 50.47(b)(5)

of 10 CFR requires emergency

response plans for nuclear power reactors to include a means of providing

early notification

and clear instruction

to the populace within the plume exposure pathway emergency planning zone (EPZ) in the event of an emergency.

Many nuclear power reactor sites have integrated

tone alert radios into alert and notification

systems used to notify and provide instructions

to members of the general public near the site during emergency

situations.

t$DR~~~~ If aeq 0n 9Goc 9603270127

1\ -

% i KY-2 IN 96-19 April 2, 1996 These radios may serve as supplements

to a siren system by filling in voids in siren coverage, or they can be the principal

means of notifying

the EPZ population.

Tone alert radio receivers

are used in conjunction

with the EAS.On December 28, 1994, the FCC issued a Report and Order (59 FR 67090)concerning

the Emergency

Broadcast

System (EBS). This Report and Order replaced the EBS with what is now known as the EAS. This change allowed for the creation of a new generation

of alerting equipment

embracing

digital technology.

The change also modified some of the old EBS requirements.

One of the changes permits the use of a shorter duration tone activation

signal to activate tone alert radio receivers.

This change may have decreased

the reliability

of some tone alert radios currently

in use to activate when required.Before July 1, 1995, the broadcast

duration of the signal that activates

tone alert radios was required to be between 20 and 25 seconds. After July 1, 1995, the broadcast

duration of the signal that activates

tone alert radios was permitted

to be between 8 and 25 seconds. The FCC encourages

the use of the longer (up to 25 seconds) tone during emergencies.

Tone alert radio receivers

are, and have been, available

from various manufacturers

for several years. Depending

on the specifications

provided by the purchaser, the threshold

for activation

has been built into receivers.

The signal duration needed for some tone alert radio receiver models may be longer than the currently

approved 8-second minimum signal duration now allowed by FCC regulations.

The FCC regulations

permit individual

radio stations to select the duration of the activation

signal they broadcast, provided it is within the limits of 8 to 25 seconds. To reliably activate a tone alert radio receiver the duration of the activation

signal broadcast

by the radio station must be long enough to meet the activation

threshold

built into tone alert radio receivers

in service in a particular

reception

area. If the duration of the activation

signal broadcast

is not compatible

with the threshold

set in a receiver, the reliability

of the receiver response is questionable.

Either the duration of the activation

signal broadcast

or the threshold

for activation

built into receivers

may need to be modified to ensure compatibility.

i N' IN 96-19 April 2, 1996 This Information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Den4 o. Cru e , Director Division of Reactor Project Management

Office of Nuclear Reactor Regulation

Technical

contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl~nrc.gov

J. L. Birmingham, NRR (301) 415-2829 Internet:lb4@nrc.gov

Attachment:

List of A b1~f;ilivJ-

Recently Issued NRC Information

Notices%b eo

Attachment

IN 96-19 April 2, 1996 LIST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 96-18 95-03 Supp. 1 96-17 96-16 Compliance

with 10 CFR Part 20 for Airborne Thorium Loss of Reactor Coolant Inventory

and Potential Loss of Emergency

Mitiga-tion Functions

While in a Shutdown Condition Reactor Operation

Incon-sistent with the Updated Final Safety Analysis Report BWR Operation

with Indicated

Flow Less Than Natural Circulation

Unexpected

Plant Perform-ance During Performance

of New Surveillance

Tests Degradation

of Radwaste Facility Equipment

at Millstone

Nuclear Power Station, Unit 1 Potential

Containment

Leak Paths Through Hydrogen Analyzers Control Rod Insertion Problems 03/25/96 03/25/96 03/18/96 03/14/96 03/08/96 03/01/96 02/26/96 02/15/96 All material licensees authorized

to possess and use thorium in unsealed form All holders of OLs or CPs for PWR power plants All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for boiling-water

reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors All holders of OLs or CPs for nuclear power reactors 96-15 96-14 96-13 96-12 OL = Operating

License CP = Construction

Permit

IN 96-xx March xx, 1996 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Project Management

Office of Nuclear Reactor Regulation

Technical

contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl~nrc.gov

J. L. Birmingham, NRR (301) 415-2829 Internet:jlb4@nrc.gov

Attachment:

List of Recently Issued NRC Information

Notices* See previous concurrence

OFFICE PERB:DRPM:NRR

SC/PERB:DRPM

I C/PERB:DRPM:NRR

NAME DMBarss* THEssig* CLMiller*I DATE 03/18/96 03/18/96 I 03/18/96 OFFICE TECHED:RPB

PECB:DRPM:NRR

C/PECT.VPM.?NRR

D/DRPM:HRR

NAME BCalure* l JBirmingham*

AEChaffJ DMCrutchfield

DATE I03/ /96 03/21/96 03/a2/96 V0! 03/ /96.rrt -t~~s e rserl swur 1.w -ntn^ *a.PlrIULAL WULUiILFI

wAML: b: JLL1 I\UNLALKI.1N

IN 96-xx March xx, 1996 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Dennis M. Crutchfield, Director Division of Reactor Project Management

Office of Nuclear Reactor Regulation

Technical

contacts: D. M. Barss, NRR (301) 415-2922 Internet:dmbl@nrc.gov

J. L. Birmingham, NRR (301) 415-2829 Internet:jlb4@nrc.gov

Attachment:

List of Recently Issued NRC Information

Notices 11 5 ?ee-e a 4jo&5 Cti4et- A4J-t.OFFICE PERB:DRPM:NRR

SC/PERB:DQPM

C/PERB:DRPNRR

NAME DMBarss Z&N 6 THEssig 1& J MWller l_ _ _ are __ _= .. .-_I_ .DATE 03/IJ/96 j 03/0TV/96 l 03I%'iI96 J OFFICE TECHED:RPB

PECB:DRPM:NRR

C/PECB:DRPM:NRR

D/DRPM:NRR

NAME 1 JBirmingham

-AEChaffee

DLCrutchfield

DATE I03/'t /96 1031&'196/4

03/ /96 103/ A96 O DUMT N--E: : _ _ -._. ..OFFICIAL DOCUMENT NAME: G:.\MLMUS\1UNLALK1.1N

OFFICE PERB:DRPM:NRR

SC/PERB:DRPM

C/PERB:DRPM:NRR

NAME DMBarss THEssig CLMiller.DATE 03/ /96 03//96 03/ /96 OFFICE TECH PECB:DRPM:NRR

C/PECB:DRPM:NRR

D/DRPM:NRR

NAME 4 JBirmningham

AEChaffee

DLCrutchfield

DATE 03//P96 03/ /96 03/ /96 03/ /96-.r .I .rl., , nu n ... uuS e -t. * .lr 4- AI .t Val UrlWlAL UULUMtNI NAML: b: FILMUZO\ I URALK I. I *


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