ML20009G413
| ML20009G413 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/19/1981 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Lee O PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 8108040230 | |
| Download: ML20009G413 (7) | |
Text
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16 H Q ' s, VUt Q Q Pi l
June 19, 1981 2
@gi I f g' Docket No. 50-267 l
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ATTN: Mr. O. R. Lee, Vice President TE O 31981
- 9 Public Service Company of Colorado Y
Electric Production h u.s.ieum uwton
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P. O. Box 840
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Denver, Colorado 80201 sh s
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'M(7 Gentlemen:
Immediately following the accident at Three Mile Island, the Nuclear Regulatory Commission installed a nationwide Emersency flotification System (ENS or System) to facilitate notification to the NRC of events and conditions at licensed nuclear power plants. The ENS is a dedicated telephone system connecting selected nuclear facilities to the NRC Operations Center. The ENS currently in use experiences a number of operational problems including false rings, lack of circuit assurance indication, and reduced voice quality when multiple extensions are in use. A system modification has been developed by the NRC and AT&T to overcome these difficulties and, additionally, to provide ringing in the Resident Inspector's office when the ENS circuit is activated by licensee personnel. This modification will be installed and provided by the NRC.
In order to facilitate scheduling of the system upgrade, the NRC needs infor-mation on logistic support which will be available at licensed activity sites prior to actual implementation of the upgrade.
In addition, NRC staff members wish to coordinate the planned actions to upgrade the system with appropriate licensee teleconaunication planning personnel. Accordingly, licensees are requested to notify C. H. Hackney, NRC regional project officer, by close of business on July 6, 1981, of the availability of the following logistic support:
timely access for telephone company representatives to make a site survey and subsequently for installing station packages for the upgrade; power for the station packages; adequate cable facilities (cable pairs);
teleconnunications planning personnel to serve as primary contacts during the modification; 5Epl s
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.FICI AL RECORD COPY- - - -. - -. - - - - - - - --
OF
y Public Service Company of Colorado a listing of each existing and proposed ENS station location based on generic name (e. g. Control Room, TSC, EOF, etc.), building name and address, room number (NOTE: Stations not identified by the HRC as required may be removed or not installed);
indication of any planned station moves or installations to be completed at the time of the ENS modification; j
indication of any temporary ENS station locations and the expected date and building / room number for relocation to permanent locations; indication of anticipated problems in meeting a system upgrade start date of approximately August 1,1981.
l NRC will schedule actions to upgrade the EHS on a priority basis for those facilities where support is available and will coordinate closely with licensee contact personnel in resolving problems where the support is not planned to be available at the beginning of the upgrade implementation.
> outlines in greater detail the nature of the upgrade and also the support facilities, which the NRC Staff presently considers necessary to imple-ment the proposed changes in the ENS. A graphical representation of the con-figuration of the ENS upgrade is in Enclosure 2.
In view of the upgrade modification of the ENS changes to the current EltS configuration should be held to an absolute minimum until the proposed upgrade is actually implemented. Requests for modifications to the current system configuration should be accompanied by a detailed justification and forwarded to the HRC Regional Office. Such modifications may be approved at the discretion of the NkC.
For your information the NRC staff is developing a recan=andation to revise NRO regulations to require use of the ENS as the primary means of reporting events and conditions specified in 10 CFR Part 50.72. This is already current practice.
This information collection is authorized by law under Sect for 161 of the Atomic Energy Act of 1954, as amended. While you are not ree ; N ta respond, your cooperation is needed to facilitate the upgrade of cne E ~ teWke it a more reliable system.
""'"""~*'""'"2' OFFICIAL RECORD COPY i
Public Service Company of Colorado Hote: The reporting requirements contained in this letter have been approved by the Office of Managenent and Budget; OMB Approval No. 3150-0068 expires December 31, 1981.
Sincerely, Or i-._. d cnca by J U.:
T. Collins
/ d Karl V. Seyfri Director
Enclosures:
1.
ENS Specifications 2.
ENS Upgrade Configuration cc:
D. W. Warembourg, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Platteville, Colorado 80651 L. Brey, Manager, Quality Assurance bec to DAC:ADM CENTRAL FILES PDR:HQ bcc distrib. by RIV LPDR Colorado State Dept. Health TIC NSI l
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SPECIFICATIONS FOR PROPOSED UPGRADING OF THE EMERGENCY NOTIFICATION SYSTEM A.
Station Locations:
ENS stations are te be located as follows:
Power Plants Control Room Shift Supervisor's Office (0ptional)
Technical Support Center (TSC)
Emergency Operations Facility (EOF)
Resident Inspector's Office Specific locations may vary due to site-specific conditions.
The primary location at each power plant is the Control Room.
The station package for the Control Room ENS will normally serve the TSC and may serve other extensions.
This station package also serves the auxiliary packages for the site.
It is designated the Main Control Package and is described in further detail in a subsequent paragraph.
B.
Facility, Cable and Wiring:
1.
Facilities:
A four-wire facility (two cable pairs) will interconnect the serving Central Office to the main control package on site.
An additional two cable pairs will interconnect the main control package to each onsite and offsite auxiliary package.
2.
Station Wiring:
Six cable pair will interconnect with package (main or auxiliary) with each station.
One additional wire will support each station equipped with an alarm or monitoring system (spokcsman).
This cable is to be terminated on a 25 pin amphenol connector.
C.
Capacities:
1.
Main Control Package:
To insure maximum system integrity, the main control package should be installed in the same building, and as close as pos-sible, to the Control Room's ENS instrument.
r
. A maximum of four stations can be fed off this package.
Extension stations are limited to a cable distance of 100 ohms or approximately 1,000 feet from the main control package.
Typical stations--Control Room (s), TSC, Shift Supervisor's Office.
2.
Auxiliary Packages (except ALT, E.0.F.):
A maximum of four stations can be fed by each auxiliary package:
Normally, stations should be within 1000 ohms or 10,000 feet of main control package.
3.
Emergency Operations Facility (E0F or ALT, E.0.F.):
A maximum of three stations can be fed off this package.
No resistance or distance limits.
D.
Physical / Hardware Considerations:
1.
Main Control Packages:
Equipment will be encased in an apparatus cabinet (IEC case).
Dimensions:
18 inches high 9 1/2 inches deep 26 1/2 inches wide Weight:
approximately 80-90 lbs.
2.
Auxiliary Packages -- E0F, Resident Inspector's Office ALT. EOF:
Equipment will be encased in a apparatus cabinet (16C case).
Dimensions:
18 inches high 9 1/2 inches deep 26 1/2 inches wide.
Weight:
approximately 50 lbs.
r
. E.
Power 1.
The upgrade equipment cannot be powered at any licensed facility by the telephone company central office and requires access to local power.
2.
Main control package:
Two 110 volt, 60 cycle, 4 amp, A/C power outlets.
3.
Auxiliary packages:
One 110 volt, 60 cycle, 1 amp, A/C power outlet.
4.
Protective Power:
The Main Control Package will be located as near as feasible to the Control Room and will be served with critical power of the same reliability as the Control Room itself.
All other packages will be provided reliable power to the same degree as the facility which they support.
No ENS station can operate unless the Main Control Package and (where applicable) the Auxiliary Package serving that station has power.
Therefore, the power reliability, including back-up systems, should be the same for each ENS station package as for the continued operation for the facility itself.
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