ML19296C331
| ML19296C331 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 02/01/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| References | |
| NUDOCS 8002250591 | |
| Download: ML19296C331 (1) | |
Text
b e arco,b, UNITED STATES
-['y)',..f 'j NUCLEAR REGULATORY COMMISSION
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- c. c REGION V
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1990 N. CAllFORNI A BOULEVARD 0,
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SulTE 202, WALNUT CRCEK PLAZA
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WALNUT CP EE K, CALIF ORNI A 94596 February 1, 1980 Srcramento Municipal Utility District P. O. Box 15830 Sacramento, California 95813 Attention: Mr. John J. Mattimoe Assistant General Manager Gentlemen:
The enclosed Circular 80-02 is forwarded to you for information.
If there are any ouestions related to your understanding of the suggested actions, please contact this office.
Sincerely,
-O, C-u,h~i pj N
t R. H. Engelken Director Enclosures :
1.
IE Circular No. 80-02 2.
List of IE Circulars Recently Issued cc w/ enclosures:
R. J. Rodriguez, SMUD L. G. Schwieger, SMUD 8002250 Set l
SSINS No.
6839 Accession f'o. :
UNITED STATES 7912190657 NUCLEAR REGULATORY CO't:11SSION OFFICE OF INSDECTIC'l AfD ENFORCE"ENT WASHINGTON, D.C.
20555 0
I E7' bI February 1, 1980 23 ui IE Circular No. 80-02 NUCLEAR POWER PLANT STAFF WM" 10URS Description of Circunstances:
Studies indicate that with fatigue, especially because of loss of sleep, an individual's detection of visual signals deteriorates narkedly, the tine it takes for a person to nake a decision increases and nore errors are made, and reading rates decrease.
Other studies show that fatique results in personnel ignoring sore signals because they develop their own subjective standards as to what is important, and as they becone more fatiqued they ignore more signals.
Inspections of cersonnel performance and training since the accident at Three Mile Island, have shown that in certain situations facility oersonnel are either reouired or allowed to remain on duty for extended periods of time.
Also, corolaints have been received from some licensed nuclear power plant operators concerning the number of continuous hours they have been on duty.
Licensee nanagenent is responsible for providing a sufficient number of trained personnel who are in the proper physical condition to operate and maintain the plant. Licensee ranagerent should review their adninistrative procedures covering the working hours of nuclear nower plant staff. These procedures should establish a sound policy coverinq workinq hours for plant staff who perforn safety related functions (e.g., senior reactor operators, reactor operators, health physicists, auxiliary operators, I&C technicians, key maintenance personnel, etc.)
Subconmittee ANS-3 is currently developing criteria to address the subject of operator work hours. These guidelines uill become a cart of ANSI N18.7. The NRC is also considering issuinq requirenents for administrative procedures that would control staff overtine.
L'ntil either the ANSI Standard is issued and endorsed by NRC (via a Reculatory Guide) or separate requirenents are issued by MRC, it is recommended that the following guidance be used.
The quidance should be aoplied to all personnel nerforming a safety related function:
1.
Scheduled work should be linited to the following naxinun work hours:
a.
An individual should not be oermitted to work nore than 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> straight.
IE Circular Plc. 80-02 February 1, 1980 Pace 2 of 2 b.
There should t,e at least a 12-hour break between all work periods, c.
An individual should not work nore than 72-hours in any 7-day period.
d.
An individual should not work nore than 14 consecutive days without having 2 consecutive days off.
2.
In the event that special circurstances arise that require deviation from the above, such deviations should be authorized by the Station Tianager with appropriate docunentation of the cause.
Plants should be staffed and schedules developed to operate such that exceotions are not recuired.
3.
If an operator is required to work in excess of 12 continuous hours, his duties should be carefully selected.
It is preferable that he not be assioned any task that affects core reactivity or could possibly endanger the safe operation of the plant.
No written resoonse to this Circular is required.
If you desire additional inforration reqarding this natter, contact the Director of the aopropriate NRC Regional Office.
IE Circular No. 80-02 Enclosure February 1, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subject Date of Issued to No.
Issue 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 79-24 Proper Installation and 11/26/79 All Holders of a Calibration of Core Spray Power Reacter CL or Pipe Break Detection CP Equipment on BWRs.
79-23 Motor Starters and 11/26/79 All Power Reactor and Contactors Failed Operating Facilities to Operate and Holders of Reactor cps 79-22 Stroke Times for Power 11/16/79 All Power Reactor Operated Relief Valves Operating Facilities and all Utilities having a CP 79-21 Prevention of Unplanned 10/19/79 All holders of Power Releases of Radioactivity Reactor OLs and cps 79-20 Failure of GTE Sylvania 9/24/79 All holders of Power Relay, Type PM, Bulletin Reactor OLs and cps 7305, Catalog SU12-11-AC with a 12V AC Coil 79-19 Loose Locking Devices 9/13/79 All Holders of Power on Ingersoll-Rand Pumps Reactor OLs and cps 79-18 Proper Installation of Target 9/10/79 All Holders of Power Rock Safety-Relief Valves Reactor Ols and cps 79-17 Contact Problem in SB-12 8/14/79 All Power Reactor Switches on General Electric Licensees with a CP Company Metalclad Circuit and/or OL Breakers