NRC Generic Letter 1983-31: Difference between revisions

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| issue date = 09/19/1983
| issue date = 09/19/1983
| title = NRC Generic Letter 1983-031: Safety Evaluation of Abnormal Transient Operating Guidelines.
| title = NRC Generic Letter 1983-031: Safety Evaluation of Abnormal Transient Operating Guidelines.
| author name = Eisenhut D G
| author name = Eisenhut D
| author affiliation = NRC/NRR
| author affiliation = NRC/NRR
| addressee name =  
| addressee name =  
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| page count = 2
| page count = 2
}}
}}
{{#Wiki_filter:v-. anSeptember 19, 1983TO ALL OPERATING REACTOR LICENSEES, APPLICANTS FOR AN OPERATING LICENSEAND HOLDERS OF CONSTRUCTION PERMITS FOR BABCOCK & WILCOX PRESSURIZEDWATER REACTORSGentlemen:
{{#Wiki_filter:v-.               an September 19, 1983 TO ALL OPERATING REACTOR LICENSEES, APPLICANTS FOR AN OPERATING LICENSE
AND HOLDERS OF CONSTRUCTION PERMITS FOR BABCOCK & WILCOX PRESSURIZED
WATER REACTORS
Gentlemen:
SUBJECT:    SAFETY EVALUATION OF "ABNORMAL TRANSIENT OPERATING GUIDELINES"
            (GENERIC LETTER 83-31)
The NRC staff has reviewed the proposed Oconee Nuclear Station, Unit 3 Abnormal Transient Operating Guidelines (ATOG) as described in Babcock &
Wilcox (B&W) Owners Group letters dated March 31, 1982 and June 15, 1982, and D. Napiors letter from B&W to the Owners Group dated March 14, 1983.


SUBJECT: SAFETY EVALUATION OF "ABNORMAL TRANSIENT OPERATING GUIDELINES"(GENERIC LETTER 83-31)The NRC staff has reviewed the proposed Oconee Nuclear Station, Unit 3Abnormal Transient Operating Guidelines (ATOG) as described in Babcock &Wilcox (B&W) Owners Group letters dated March 31, 1982 and June 15, 1982,and D. Napiors letter from B&W to the Owners Group dated March 14, 1983.As discussed in the enclosed letter to the B&W Owners Group we have con-cluded that ATOG is acceptable as a basis for implementation of improvedplant specific procedures and will provide improved guidance for operatoremergency procedures over that which currently exists. Since there is nogeneric version of ATOG for B&W plants, the utilities who are participatingin the Owners Group program are to provide sufficient documentation in theform of plant-specific ATOGs and Transient Information Documents (TIDs) sothat the NRC can perform comparisons with the ATOG version evaluated in theenclosed Safety Evaluation Report (SER). We suggest that implementation ofthe guidelines proceed in 4 steps:(1) Interim extension of ATOG to better cover ATWS and certain aspectsof natural circulation;(2) Preparation of plant specific procedures which, in general, conformto the ATOG referenced above and implementation of these proceduresas required by Generic Letter 82-33, dated December 17, 1982;(3) Preparation of supplements to the guidelines which cover changes, newequipment, or new knowledge and incorporation of these supplementsinto the procedures; and(4) Completion and improvement of the guidelines to meet our long termrequirements, followed by incorporation of improvements into plantspecific procedures.Step 1 is to be completed before ATOG is used in the implementation ofprocedures process. The prompt implementation of Step 2 will allow thebenefits of the significant improvements you have achieved to be realizedsoon. We note however, that the guidelines are written for the procedurewriters, not control room operators, and therefore, preparation and830190 '5Ef~Jt-2 Lf-Fl8309190017
As discussed in the enclosed letter to the B&W Owners Group we have con- cluded that ATOG is acceptable as a basis for implementation of improved plant specific procedures and will provide improved guidance for operator emergency procedures over that which currently exists. Since there is no generic version of ATOG for B&W plants, the utilities who are participating in the Owners Group program are to provide sufficient documentation in the form of plant-specific ATOGs and Transient Information Documents (TIDs) so that the NRC can perform comparisons with the ATOG version evaluated in the enclosed Safety Evaluation Report (SER). We suggest that implementation of the guidelines proceed in 4 steps:
-2 -September 19, 1983implementation of procedures will require additional Human Factors input.Step 3 refers to a program for guideline or procedure updates which will begenerated as a matter of routine after the implementation. This essentiallyis a maintenance function. Step 4 refers to a program for addressing thoseaspects of the guidelines and procedures where additional long term work maybe needed in your emergency procedure program.We have identified in the Safety Evaluation Report (SER) a number of itemsassociated with the guidelines which need further work by the B&W Owners.We require that these items be addressed by either incorporating them intoa future guideline revision or otherwise justifying the disposition of theitem. The Owners Group letter of May 4, 1983 provided a satisfactory out-line of a plan to change the existing ATOG to a more generic document. Weshare the Owners Group judgement that a B&W generic technical guidelinewill provide an effective mechanism for future guideline updates, changesand enhancements. Additionally, because the Abnormal Transient OperatingGuidelines must be dynamic in that changes must be made to reflect changesin equipment or new knowledge, we expect the B&W Owners' Group or a similarcoalition of utilities and vendors to accept responsibility for continuedmaintenance of the guidelines. Therefore, we have requested in the enclosedletter that the B&W Owners' Group provide a plan for addressing the SERitems and a description of the program for steps 3 and 4 above.As discussed in the enclosed SER, the staff finds that ATOG represents asignificant improvement over the guidance provided in current emergencyoperating procedures. ATOG is symptom oriented, considers multiple failures,is tolerant of operator error, addresses plant cooldown following anemergency, and addresses inadequate core cooling. We find the approachused in ATOG to be responsive to the staff's criteria. Further, ATOGcontains a significant quantity of valuable information for the guidance ofoperators under emergency conditions. The guidelines provide sufficientguidance such that they can be translated into acceptable emergency operatingprocedures using the process identified in NUREG-0899, "Guidelines for thePreparation of Emergency Operating Procedures." The staff therefore con-cludes that although efforts to improve the guidelines should continue,ATOG will provide a greater assurance of operational safety and are accept-able for implementation.
(1) Interim extension of ATOG to better cover ATWS and certain aspects of natural circulation;
(2) Preparation of plant specific procedures which, in general, conform to the ATOG referenced above and implementation of these procedures as required by Generic Letter 82-33, dated December 17, 1982;
(3) Preparation of supplements to the guidelines which cover changes, new equipment, or new knowledge and incorporation of these supplements into the procedures; and
(4) Completion and improvement of the guidelines to meet our long term requirements, followed by incorporation of improvements into plant specific procedures.


Sincerely,Darrell G. Eisenhut, DirectorDivision of Licensing
Step 1 is to be completed before ATOG is used in the implementation of procedures process. The prompt implementation of Step 2 will allow the benefits of the significant improvements you have achieved to be realized soon. We note however, that the guidelines are written for the procedure writers, not control room operators, and therefore, preparation and
                                                              830190 '5 Ef~Jt-2 Lf-Fl
8309190017


===Enclosures:===
-  2 -                September 19, 1983 implementation of procedures will require additional Human Factors input.
'1. Letter to Mr. Whitney,dated2 SER n GuidelinesDL: i#5 DL:Q D j 'SA t DL R DJL oI:cc DCrui hfield F ,1i aI, /83 1/ 83 3 83}}
 
Step 3 refers to a program for guideline or procedure updates which will be generated as a matter of routine after the implementation. This essentially is a maintenance function. Step 4 refers to a program for addressing those aspects of the guidelines and procedures where additional long term work may be needed in your emergency procedure program.
 
We have identified in the Safety Evaluation Report (SER) a number of items associated with the guidelines which need further work by the B&W Owners.
 
We require that these items be addressed by either incorporating them into a future guideline revision or otherwise justifying the disposition of the item. The Owners Group letter of May 4, 1983 provided a satisfactory out- line of a plan to change the existing ATOG to a more generic document. We share the Owners Group judgement that a B&W generic technical guideline will provide an effective mechanism for future guideline updates, changes and enhancements. Additionally, because the Abnormal Transient Operating Guidelines must be dynamic in that changes must be made to reflect changes in equipment or new knowledge, we expect the B&W Owners' Group or a similar coalition of utilities and vendors to accept responsibility for continued maintenance of the guidelines. Therefore, we have requested in the enclosed letter that the B&W Owners' Group provide a plan for addressing the SER
items and a description of the program for steps 3 and 4 above.
 
As discussed in the enclosed SER, the staff finds that ATOG represents a significant improvement over the guidance provided in current emergency operating procedures. ATOG is symptom oriented, considers multiple failures, is tolerant of operator error, addresses plant cooldown following an emergency, and addresses inadequate core cooling. We find the approach used in ATOG to be responsive to the staff's criteria. Further, ATOG
contains a significant quantity of valuable information for the guidance of operators under emergency conditions. The guidelines provide sufficient guidance such that they can be translated into acceptable emergency operating procedures using the process identified in NUREG-0899, "Guidelines for the Preparation of Emergency Operating Procedures." The staff therefore con- cludes that although efforts to improve the guidelines should continue, ATOG will provide a greater assurance of operational safety and are accept- able for implementation.
 
Sincerely, Darrell G. Eisenhut, Director Division of Licensing Enclosures: '
1. Letter to Mr. Whitney, dated
2 SER n Guidelines DL:     i#5   DL:Qj 'SA     D      t       DL R
JL oI:cc     DCrui hfield   F ,1i a I,/83       1/   83             3         83}}


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Latest revision as of 02:17, 24 November 2019

NRC Generic Letter 1983-031: Safety Evaluation of Abnormal Transient Operating Guidelines.
ML031210067
Person / Time
Site: Oconee Duke Energy icon.png
Issue date: 09/19/1983
From: Eisenhut D
Office of Nuclear Reactor Regulation
To:
References
GL-83-031, NUDOCS 8309190017
Download: ML031210067 (2)
v • d • e


v-. an September 19, 1983 TO ALL OPERATING REACTOR LICENSEES, APPLICANTS FOR AN OPERATING LICENSE

AND HOLDERS OF CONSTRUCTION PERMITS FOR BABCOCK & WILCOX PRESSURIZED

WATER REACTORS

Gentlemen:

SUBJECT: SAFETY EVALUATION OF "ABNORMAL TRANSIENT OPERATING GUIDELINES"

(GENERIC LETTER 83-31)

The NRC staff has reviewed the proposed Oconee Nuclear Station, Unit 3 Abnormal Transient Operating Guidelines (ATOG) as described in Babcock &

Wilcox (B&W) Owners Group letters dated March 31, 1982 and June 15, 1982, and D. Napiors letter from B&W to the Owners Group dated March 14, 1983.

As discussed in the enclosed letter to the B&W Owners Group we have con- cluded that ATOG is acceptable as a basis for implementation of improved plant specific procedures and will provide improved guidance for operator emergency procedures over that which currently exists. Since there is no generic version of ATOG for B&W plants, the utilities who are participating in the Owners Group program are to provide sufficient documentation in the form of plant-specific ATOGs and Transient Information Documents (TIDs) so that the NRC can perform comparisons with the ATOG version evaluated in the enclosed Safety Evaluation Report (SER). We suggest that implementation of the guidelines proceed in 4 steps:

(1) Interim extension of ATOG to better cover ATWS and certain aspects of natural circulation;

(2) Preparation of plant specific procedures which, in general, conform to the ATOG referenced above and implementation of these procedures as required by Generic Letter 82-33, dated December 17, 1982;

(3) Preparation of supplements to the guidelines which cover changes, new equipment, or new knowledge and incorporation of these supplements into the procedures; and

(4) Completion and improvement of the guidelines to meet our long term requirements, followed by incorporation of improvements into plant specific procedures.

Step 1 is to be completed before ATOG is used in the implementation of procedures process. The prompt implementation of Step 2 will allow the benefits of the significant improvements you have achieved to be realized soon. We note however, that the guidelines are written for the procedure writers, not control room operators, and therefore, preparation and

830190 '5 Ef~Jt-2 Lf-Fl

8309190017

- 2 - September 19, 1983 implementation of procedures will require additional Human Factors input.

Step 3 refers to a program for guideline or procedure updates which will be generated as a matter of routine after the implementation. This essentially is a maintenance function. Step 4 refers to a program for addressing those aspects of the guidelines and procedures where additional long term work may be needed in your emergency procedure program.

We have identified in the Safety Evaluation Report (SER) a number of items associated with the guidelines which need further work by the B&W Owners.

We require that these items be addressed by either incorporating them into a future guideline revision or otherwise justifying the disposition of the item. The Owners Group letter of May 4, 1983 provided a satisfactory out- line of a plan to change the existing ATOG to a more generic document. We share the Owners Group judgement that a B&W generic technical guideline will provide an effective mechanism for future guideline updates, changes and enhancements. Additionally, because the Abnormal Transient Operating Guidelines must be dynamic in that changes must be made to reflect changes in equipment or new knowledge, we expect the B&W Owners' Group or a similar coalition of utilities and vendors to accept responsibility for continued maintenance of the guidelines. Therefore, we have requested in the enclosed letter that the B&W Owners' Group provide a plan for addressing the SER

items and a description of the program for steps 3 and 4 above.

As discussed in the enclosed SER, the staff finds that ATOG represents a significant improvement over the guidance provided in current emergency operating procedures. ATOG is symptom oriented, considers multiple failures, is tolerant of operator error, addresses plant cooldown following an emergency, and addresses inadequate core cooling. We find the approach used in ATOG to be responsive to the staff's criteria. Further, ATOG

contains a significant quantity of valuable information for the guidance of operators under emergency conditions. The guidelines provide sufficient guidance such that they can be translated into acceptable emergency operating procedures using the process identified in NUREG-0899, "Guidelines for the Preparation of Emergency Operating Procedures." The staff therefore con- cludes that although efforts to improve the guidelines should continue, ATOG will provide a greater assurance of operational safety and are accept- able for implementation.

Sincerely, Darrell G. Eisenhut, Director Division of Licensing Enclosures: '

1. Letter to Mr. Whitney, dated

2 SER n Guidelines DL: i#5 DL:Qj 'SA D t DL R

JL oI:cc DCrui hfield F ,1i a I,/83 1/ 83 3 83

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