ML20056H500
| ML20056H500 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 08/27/1993 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20056H493 | List: |
| References | |
| NUDOCS 9309090433 | |
| Download: ML20056H500 (3) | |
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UNITED STATES
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WASHINGTON. D.C. 205560001 gvf SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO THE EVALUATION OF FIRE PROTECTION OPEN ITEMS FROM SECTION 3.2.1 0F SAFETY EVALUATION DATED MARCH 10. 1978 COMMONWEALTH EDISON COMPANY ZION NUCLEAR POWER STATION. UNITS 1 AND 2 DOCKET N05. 50-295 AND 50-304
1.0 INTRODUCTION
By letters dated March 18, 1981, and December 22, 1992, Commonwealth Edison Company (the licensee), provided additional information to resolve fire protection open items stated in Section 3.2.1 of the staff's safety evaluation (SE) of March 10, 1978.
SEs of March 24, 1980, and November 24, 1980, approved the Zion fire protection administrative controls with the exception of the following areas:
(1) control of ignition sources, (2) pre-fire strategies, and (3) actions to be taken by individuals, control room operators and fire brigade members in the event of a fire.
The SE of November 24, 1980, also stated that these areas should be upgraded to meet NRC guidelines.
2.0 EVALUATION The staff has reviewed the licensee's responses to the open items and provides the following evaluation.
2.1 Control of Ionition Sources NRC Open Item:
"In response to our position regarding control of ignition sources, the licensee proposed to implement a requirement for fire blankets or, any flammable components within a 35-foot radius of any welding operation.
The licensee has substituted the term " flammable" for " combustible." These terms do not have the same meaning and, therefore, are not interchangeable.
To meet our guidelines, the licensee should implement a control so that where welding, grinding, open flame work and cutting are being performed, all immovable combustible material below and within 35-foot radius will be protected by asbestos curtains, metal curtains, or flame proof covers."
Licensee's Response:
In its letter of December 22, 1992, the licensee stated j
that Zion's administrative procedure ZAP 900-04, " Fire Prevention When Welding, Cutting, or Grinding (Hot Work)," was established to control the welding, cutting or grinding (hot work) activities at Zion. These procedures specifically state that before welding, cutting or grinding, relocate
" combustibles" at least 35 feet from the work site.
Further, the procedure 9309090433 930827 PDR ADOCK 05000295 F
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below and within 35 feet of the work place will be covered with fire retardant material.
The staff has reviewed these procedures and found them acceptable. Therefore, l
this item is closed.
t 2.2 Pre-fire Strateaies NRC Open Item: "In response to our position on pre-fire strategies, the licensee took exception to the following:
Potential radiological and toxic hazards in fire zones; and Ventilation system operation that ensures desired plant air distribution when the ventilation flow is modified for fire containment or smoke clearing.
To meet Paragraphs 12(g) and 13(h) of Section III(K) of Appendix R, the license should modify their pre-fire strategies to include these items."
Licensee's Response: The licensee revised the Zion pre-fire plan for each fire zone to include identification of specific hazards such as radiation, contamination, and toxic hazards. The ventilation concern has been addressed in the Zion pre-fire plans.
The plans designate the ventilation systems, components, power supplies, and breaker numbers for both normal and emergency i
ventilation lineups in each fire zone.
The pre-fire plans also detail the recommended method of smoke removal for each fire zone. The fire fighting administrative procedures also direct the control room operators to restart ventilation if it was secured, following verification from the fire brigade leader that the required fire dampers are closed.
i The licensee has adequately resolved the open item. Therefore, this item is closed.
2.3 Control Actions to be Taken by Individuals. Control Room Operators. and Fire Briaade Member in the Event of a Fire.
i NRC Open Item:
"In addition, to meet Paragraphs 9, 10, 11 of Section III(K) of Appendix R, the licensee should modify their administrative controls to establish procedures to:
- 1) Control actions to be taken by an individual discovering a fire, such as notification of control room, attempt to extinguish fire, and actuation of local f're suppression systems
- 2) Control actions to be taken by the control room operator to determine the need for brigade assistance upon report of a fire or receipt of alarm on control room annunciator panel, such as announcing location of fire over PA system, sounding fire alarms, m
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and notifying the shift supervisor and the fire brigade leader of the type, size and location of the fire; and
- 3) Control actions to be taken by the fire brigade after notification by the control room operator of a fire, such as assembling in a designated location, receiving directions from the fire brigade leader, and discharging specific fire fighting responsibilities including selection and transportation of fire fighting equipment to fire location, selection of protective equipment, use of fire suppression systems operating instructions,.and use of preplanned strategies for fighting fires in specific areas."
Licensee's Response: The licensee established administrative procedure ZAP 900-08, Revision 0, " Station Fire Brigade," on August 28, 1992, to resolve this open item. This procedure directs any person discovering a fire, no matter what the size, to immediately report to the control room using the emergency phone number or public address system.
This procedure also f
designates the actions to be taken by the control room personnel upon receipt of a report of fire or fire alarm.
Finally, this procedure specifies the actions to be taken by the fire brigade members.
Based on the staff's review of the procedure, this item is closed.
3.0 CONCLUSION
i The licensee's responses to the fire protection open items stated in the SE of March 10, 1978, are acceptable. Therefore, the staff has concluded that the open items are closed.
Principal Contributor: Amarjit Singh Date: August 27, 1993 i
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