ML19323D503
| ML19323D503 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/30/1980 |
| From: | Pappas H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8005210620 | |
| Download: ML19323D503 (2) | |
Text
[ gung TIC t~g UNITED STATES
[ ~ 3,,
g NUCLEAR REGULATORY COMMISSION 1 a REGION 111 g
I g
[
799 ROOSEVELT ROAD
...../
GLEN ELLYN, ILLINOIS 60137
{
APR 3 01980 MEMORANDUM FOR: Those on Attached List FROM:
Helen Pappas, Chief, Administrative Branch
SUBJECT:
IE CIRCULAR NO. 80-09 The attached IE Circular No. 80-09 titled " Problems With Plant Internal Communications Systems" was sent to the licensees listed below on April 28, 1980 for action:
American Electric Power Service Corporation Indiana and Michigan Power Company D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas & Electric Company Zimmer (50-358)
Cleveland Electric Illuminating Company Perry 1, 2 (50-440, 50-441)
Commonwealth Edison Company Braidwood i, ? (50-456, 50-457)
Byron 1, 2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249)
LaSalle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company Big Rock Point (50-155)
Midland 1, 2 (50-329, 50-330)
Palisades (50-255)
Dairyland Power Cooperative LACBWR (50-409)
Detroit Edison Company Fermi 2 (50-341)
Illinois Power Company Clinton 1, 2 (50-461, 50-452) 8005210620
f Those on Attached List APR 3 01560 Iowa Electric Light & Power Company Duane Arnold (50-331)
Northern Indiana Public Service Company Bailly (50-367) t Northern States Power Company Monticello (50-263)
Prairie Island 1, 2 (50-282, 50-306)
Public Service of Indiana Marble Hill 1, 2 (50-546, 50-547)
Toledo Edison Company Davis-Besse 1 (50-346)
Union Electric Power Company Callaway h, 2 (50-483, 50-486)
Wisconsin Electric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305)
Lbled
/f G
Helen Pappas, Chief Administrative Branch
Enclosure:
IE Circular No. 80-09
I Addressees - Memorandum dated April 29, 1980 Central Files Reproduction Unit NRC 20b
SSINS No.:
6830
.1 Accession No.:
UNITED STATES 8002280663 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT T
~
D 3
WASHINGTON, D.C.
20555 sa s,.o April 28, 1980 IE Circular No. 80-09 PROBLEMS WITH PLANT INTERNAL COMMUNICATIONS SYSTEMS Description of Circumstances at the Kewaunee Power Plant:
On January 17, 1980, the Kewaunee Nuclear Power Plant lost offsite power to its 4160V non-safeguards buses.
Since the system used for internal communica-tions, paging and evacuation alarm purposes (Gai-tronics) was powered from a non-safeguards bus, plant communications were degraded during the outage.
This degraded condition persisted until power was restored to the affected bus thru an emergency safeguards bus. While in the degraded mode, the licensee us;d two-way portable radios for internal communications.
The radios performed satisfactorily, per se; however, when transmitting in the vicinity of certain electronic equipment, they induced false signals into the electronic equipment.
Description of Circumstances at the Davis-Besse Power Station:
On October 15, 1979, the Davis-Besse Power Station lost all offsite power.
During the period when offsite power was not available, the licensee noted that the internal three digit telephones (GTE) would not function.
In addition, the NRC " Red Phone" was subsequently reported to have been out of service. Other licensee phone systems (Gai-tronics and the outside four digit Ohio Bell phones) did work.
Following this event, the licensee provided emergency power to its phones and the NRC took action through AT&T to provide emergency power to all Red Phones.
(Note:
Although the communications system at Davis-Besse was not designed to meet the single failure criterion, its FSAR states that the main internal communications system is supplied by two redundant power feeders from the uninterruptable instrumentation distribution panels.)
RECOMMENDED ACTION FOR LICENSEES AND HOLDERS OF CONSTRUCTION PERMITS All licensees of nuclear power reactors and holders of construction permits should be aware of the potential problems described above.
Because of the 4
generic implications of the above problems, it is recommended that the following actions be considered:
1.
Determine the source of power for plant internal communications systems; 2.
Upgrade the internal communications systems to assure cperability during the loss of offsite power or other foreseeable events; 1
l
IE Circular No. 80-09 April 28, 1980 Page 2 of 2 1
3.
Determine whether any plant electronic equipment may be adversely affected by portable radio transmissions.
This determination should include, but not be limited to, the computer system, electro-hydraulic i
system, and nuclear instrumentation system; and j
4.
Instruct employees on the use of radios in areas susceptible to electro-magnetic interference.
No written response to this Circular is required; however, if additional j
information regarding these matters is required, contact the Director of the appropriate NRC Regional Office.
L
'o
<3 IE Circular No. 80-09 Enclosure April 28, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subject Date of Issued to No.
Issue 80-08 BWR Technical Specification 4/18/80 All General Electric Inconsistency - RPS Response BWR's holding a power Time reactor OL 80-07 Problems with HPCI Turbine 4/3/80 All holders of a power Oil System reactor OL or CP 80-06 Control and Accountability 4/14/80 Medical licensees in Systems for Implant Therapy Categories G and G1 Sources 80-05 Emergency Diesel-Generator 4/1/80 All holders of a power Lubricating Oil Addition and reactor OL or CP Onsite Supply 80-04 Securing of Threaded Locking 3/14/80 All holders of a power Devices on Safety-Related reactor OL or CP Equipment 80-03 Protection from Toxic Gas 3/6/80 All holders of a Hazards power reactor OL 80-02 Nuclear Power Plant Staff 2/1/80 All holders of Reactor Work Hours OLs, including research and test reactors, and cps 80-01 Service Advice for GE 1/17/80 All licensees of Induction Disc Relays nuclear power reactor operating facilities and holders of nuclear power reactor cps 79-25 Shock Arrestor Strut 12/20/79 All licensees and Assembly Interference holders of power reactor cps h9-24 Proper Installation and 11/26/79 All Holders of a Calibration of Core Spray Power Reactor OL or Pipe Break Detection CP Equipment on BWRs.
l 1
.