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Home NRC Library Document Collections NUREG-Series Publications Publications Prepared by NRC Staff NUREG 0933Task II.E: SYSTEM DESIGN: Auxiliary Feedwater System: Auxiliary Feedwater System Evaluation

Task II.E: SYSTEM DESIGN: Auxiliary Feedwater System: Auxiliary Feedwater System Evaluation

TASK II.E.1: AUXILIARY FEEDWATER SYSTEM

The objective of this task was to improve the reliability of the auxiliary feedwater (AFW) system.

ITEM II.E.1.1: AUXILIARY FEEDWATER SYSTEM EVALUATION

This item was clarified in NUREG-0737,[1] requirements were issued, and MPA F-15 was established by DL/NRR for implementation purposes.

ITEM II.E.1.2: AUXILIARY FEEDWATER SYSTEM AUTOMATIC INITIATION AND FLOW INDICATION

This item was clarified in NUREG-0737,[2] requirements were issued, and MPAs F-16 and F-17 were established by DL/NRR for implementation purposes.

ITEM II.E.1.3: UPDATE STANDARD REVIEW PLAN AND DEVELOP REGULATORY GUIDE

DESCRIPTION

This TMI Action Plan[3] item called for NRR to update SRP[4] Section 10.4 and for RES was to revise Regulatory Guide 1.26 to cover AFW systems; the Regulatory Guide was to possibly endorse ANSI/ANS-51.00 and 52.00.

CONCLUSION

SRP[5] Section 10.4.9 was updated in July 1981 to include the requirements[6] of Items II.E.1.1 and II.E.1.2. Revision of Regulatory Guide 1.26[7] to endorse the ANSI/ANS Standards was not pursued because it was considered a low priority task by RES. No additional public and occupational risk reduction was identified to support the need for development of a Regulatory Guide. Thus, this item was RESOLVED and new requirements were established with changes to the SRP.[8]

 


[1] NUREG-0737, "Clarification of TMI Action Plan Requirements," U.S. Nuclear Regulatory Commission, November 1980, (Supplement 1) January 1983.

[2] NUREG-0737, "Clarification of TMI Action Plan Requirements," U.S. Nuclear Regulatory Commission, November 1980, (Supplement 1) January 1983.

[3] NUREG-0660, "NRC Action Plan Developed as a Result of the TMI-2 Accident," U.S. Nuclear Regulatory Commission, May 1980, (Rev. 1) August 1980.

[6] NUREG-0737, "Clarification of TMI Action Plan Requirements," U.S. Nuclear Regulatory Commission, November 1980, (Supplement 1) January 1983.

[7] Regulatory Guide 1.26, "Quality Group Classifications and Standards for Water-, Steam-, and Radioactive- Waste-Containing Components of Nuclear Power Plants," U.S. Nuclear Regulatory Commission, March 1972, (Rev. 1) September 1974, (Rev. 2) June 1975, (Rev. 3) February 1976.

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