ML20040B422
| ML20040B422 | |
| Person / Time | |
|---|---|
| Site: | Monticello, Dresden, Davis Besse, Palisades, Kewaunee, Point Beach, Prairie Island, Duane Arnold, Cook, Quad Cities, La Crosse, Big Rock Point, Zion, LaSalle, 05000000, Zimmer |
| Issue date: | 01/18/1982 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | AMERICAN ELECTRIC POWER CO., INC., CINCINNATI GAS & ELECTRIC CO., COMMONWEALTH EDISON CO., CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.), DAIRYLAND POWER COOPERATIVE, IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT, NORTHERN STATES POWER CO., TOLEDO EDISON CO., WISCONSIN ELECTRIC POWER CO., WISCONSIN PUBLIC SERVICE CORP. |
| References | |
| NUDOCS 8201260033 | |
| Download: ML20040B422 (3) | |
Text
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American Electric Power Service Corporation D. C. Cook 1, 2 (50-315, 50-316)
O f
Cincinnati Gas and Electric Company l
Zimmer (50-358)
HEC 5WED D
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Commonwealth Edison Company 1
JAN 2 51982a
~2 Dresden 1, 2, 3 (50-10, 50-237, 50-249)
' nmem nnema La Salle 1, 2 (50-373, 50-374) 5 CM mN H
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Quad-Cities 1, 2 (50-254, 50-265)
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Zion 1, 2 (50-295, 50-304) 4, g
Consumers Power Company Big Rock Point (50-155)
Palisades (50-255)
Dairyland Power Corporation LACBWR (50-409)
Iowa Electric Light and Power Company Duane Arnold (50-331) f Northern States Power Company Monticello (50-263) i Prairie Island 1, 2 (50-282, 50-306)
Toledo Edison Company i
Davis-Besse 1 (50-346) q Wisconsin Electric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305) i 1
1
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8201260033 820118 hDRADOCK 05000010 PDR
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JAN 19 @
Gentlemen:
An inherent problem has been discovered with the new (4 wire) Emergency Notification System (ENS) telephone circuit. The problem is described here along with a simple method of prevention which should be used until l
telephone engineers complete equipment modifications.
Af ter a call has been established (the originator of the call makes no difference) and terminated on the ENS circuit, if a receiver is picked up at a facility before the circuit light is off, the telephone circuit for that facility will " lock up."
This results in the facility not being able to call out on the ENS circuit and the NRC lleadquarters not being able to call the facility. After " lock up" occurs a telephone serviceman will be required to disconnect and reconnect the phone circuit at the lleadquarters switchgear. For example:
The NRC lleadquarters calls a operating power reactor for daily plant. status. The reactor facility answers the call and gives the necessary information, af ter which, both parties hang up.
The facility, realizing that he forgot to give some item of information, picks up the ENS quickly, trying to catch the NRC lleadquarters before lleadquarters hang up their phone. This type of action results in " lock up."
To prevent " lock up" f rom occurring, the facilities should ensure that. a second call is not established within 20 seconds after the original call.
NRC lleadquarters will be monitoring all ENS phone line indicators and will inform the facility when lock up occurs and provide a commercial phone number to use to contact NRC lleadquarters.
In addition, the NRC will contact the telephone company and initiate the necessary action to release
" lock up."
JAN 18 TR2 Telephone company engineers have found a salution to permanently correct the " lock u~p" problem.
Until the "fix" car. be applied, we appreciate your cooperation in helping us minimize the phone circuits being " locked up" and therefore maintaining the integrity of the Emergency Notification System.
Sincerely, Original signed by J::mes G. Kuppler James G. Keppler Regional Administrator RIII HI:
RI I RIII Paperi lo/np 11 1 1 avis K
ler 1/16/82 dphL
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