Regulatory Guide 3.14
| ML003740247 | |
| Person / Time | |
|---|---|
| Issue date: | 10/31/1973 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| References | |
| RG-3.014 | |
| Download: ML003740247 (2) | |
October 1973 U.S. ATOMIC ENERGY COMMISSION
)REGULATORY
DIRECTORATE OF REGULATORY STANDARDS
GU IDE
1REGULATORY GUIDE 3.14 SEISMIC DESIGN CLASSIFICATION
FOR PLUTONIUM PROCESSING AND FUEL FABRICATION PLANTS
A. INTRODUCTION
2. Proper design, construction and maintenanc of primary confinement barriers such as glove boxes, Each applicant for a license to possess and use tankage, piping, and storage containers, whose failure special nuclear material in a plutonium processing and would result in release of substantial quantities of fuel fabrication plant as defined in paragraph 70.4(r) of dispersible plutonium inside the structure; and
10 CFR Part 70, "Special Nuclear Material," must 3. Proper design, installation, and maintenance of satisfy the provisions of § 70.23, "Requirements for the systems which serve to protect or monitor the integrity Approval of Applications." Paragraph 70.23(b) requires of items 1. and 2. above or otherwise function to that the design bases of the principal structures, systems, mitigate consequences of the event.
and components of such a plant and the quality assurance program provide reasonable assurance of A seismic design classification system has been protection against natural phenomena. Specifically, developed for identifying those plant features that those structures, systems, and components important to should be designed to withstand the effects of safety whose continued integrity or operability is earthquakes, thus providing assurance that the plant can essential to assure confinement of radioactive material be constructed and operated without undue risk to the must be designed and constructed to withstand the health and safety of the public. Those structures, effects of earthquakes and still be capable of performing systems, and components that should be designed to their required safety functions. remain functional if an earthquake occurs have been designated as Seismic Category I.
This guide describes a method acceptable to the Regulatory staff for identifying and classifying those plant features that should be designed to withstand the
C. REGULATORY POSITION
effects of earthquakes.
I.. The following structures, systems, and components of a plutonium processing and fuel fabrication plant,
B. DISCUSSION
including their fW*ndations and supports, are designated as Seismic Category I and should be designed to Plutonium processing and fuel fabrication plants withstand the effects of earthquakes and remain must be designed, constructed, and operated to protect functional to the extent that they will prevent the the health and safety of the public from the release and uncontrolled release of radioactive materials. The dispersal of radioactive materials that might result from pertinent quality assurance requirements of Appendix B
the effects of natural phenomena, including earthquakes. of 10 CFR Part 50 should be applied to all activities This, objective may be achieved with a high degree of affecting the safety-related functions of these structures, assurance through application of the defense-in-depth systems, and components.
concept by:
I. Proper design, construction, and maintenance of the a. The final confinement barrier and systems'
final confinement barrier, Le., the exterior structure associated with maintenance of Its functional Integrity.
housing operations involving plutonium in dispersible form, including structure penetrations such as doors and
'The system boundary includes those portions of the ventilation/exhaust systems; system required to ccomplish the specified safety function.
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Included are the plant exterior structure, ventilation . Storap and procc.s containers, including intake filters or suitable intake damper, and the building tankage and piping. fir plulonium,-ibring materials that exhaust ventilation system (i.e., that porticn of the are not contained In appropriately designed Seisntic system consisting of rmal filtration equipment and Category I glove boxes.
equipment necessary to maintain a negative building pressure). 2. Those portions of structures, systems, or b. Glove boxes that may contain quantities of components whose continued function is not required plutonium powder or solutions. bt~t whose failure could reduce the functioning of any c. Fire protection systems." plant feature included in regulatory position C.I. above d. Safety-related monitoring and alarm systems.' to- a unacceptable safety level should be designed and Included are those systems concerned with criticality, constructed so that an eirthquake would not cause such combustible gases, effluents, and maintenance of failure.
pressure differential between the ambient atmosphere and the plant interior.
e. Emergency utility services, Included are an 3. Seismic Category 1 design requirements should electrical supply system with sufficient power and extend to the first seismic restraint beyond the defined distribution networks to maintain the systems specified boundaries. Those portions .of structures, systems, or in regulatory positions C.I.a., c., and d., above, water components which form an interface betiveen Seismic supply systems with sufficient capacity and distribution Category I and non-Seismic Category I features should capability for fire protection and requited equipment be designed to Seismic Category I requirements.
cooling, a compressed air supply system with sufficient capacity and distribution capability for safety-related instrumentation and controls, and lighting to aid in 4. The pertinent quality assurance requirements of personnel egress and reentry. Appendix B to 10 CFR Part 50 should be applied to the f. Fissile material storage vaults and components. safety requirements of those portions of structures, Included are floors, walls, ceilings, doors, racks, and systems, and components included in regulatory separation barriers. positions C.2. and C.3. above.
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