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Requirement
Number
Source Requirement Text
967 43 Size (installed Capacity) of Air-Cleaning Un t:
The installed capacity ctm (m'31hr) of the air cleaning unit shall be no g reater than tre IimiUng Installed capacity of any bank of components
contained In the air cleaning unit through which Ile ai;Row must pass. The lrstaite_ capacity of any bank o r stage of components shell not exceed
Ih0 number of cdmponerHS in the bank times the rated capacity of the individual components. Test canisters shall not be included In determining
.
the Installed a aci of an bank or sta a of adsorbers.
968 4 4 Environmental Design Conditions:
All parts and components of the air-cleaning unit shall be selected or designed to operate under the envi ro nmentai conditions (temperature,
relative humidity,. p re ssure, radiation, etc.) specified in paragraph 4.2. Materials of cons wiction and components snail be selected or treated to
limit generation of combustibles and contaminants and to resist cor rosion and degradaton that would re sult In loss of function when exposed to the
specified environmental conditions for the design life of the component.
Environmental qualification requirements are contained in 10 CFR 50.49 and EEE 323 and ASME AG1, Section AA and various specific ASME
AG-1 Code sec ti ons,
969 4,5 Structural Load Requ ir
ements:
Engineered Safety Featu re (ESF) systems and ail of their components shall be shown, either by testing or by a mathematical technique, to
remain functional under the structural loading speci fi
ed in ASME AG-1, A rticle AA-4000 and various speci fic ASME AGA Code sections,
verification a a
tion Design Document
R-Review P,efere^ce
I A .'Analysis (Where is this requi rement
T • Test Incorporated in the design)
r a ".r5 K 4Sfi i:. (%Cleaitin ^Un tr ail (?om o^enfs'Tha't dust VVitli'sfani3 .an s gees"suYd 3 .. >.. `
970 4.6 The maximum design p ressure shall be documented by calculation, including the basis for the condition, and included In p ro cu re ment speci fications
for manufacturels design.
971 4.6(a) Positive Pressure: Air-cleaning units and components including ducts Totaled on the discharge side of fan(s) which can be Isolated by closure of a
downst ream damper, or pote ntially plugged components, shall be designed to withstand a positive Inte rn al pressure equal to or greater than the
peak pressure of the fan(s). If p rovision is made to ceenergize fans on high differential p re ssure or low Row, lne components shall be designed to
withstard the trip poi nt design pressu re plus a margin to include the rate of pressure ri se between re aching the pressu re setpotrm and the time for
the instrumentation response, or 10%, whichever is greater.
972 4.6 (b) Negative Pressu re . Air-cleaning units and components located on the inlet side of fans) which can be isolated by closure of an upst re am damper,
or potentially plugged components shall be designed to withstand a negative inte rn al pressu re equal to or mo re negative than the peak pressure of
the fan(s), If provision Is made to deenergize fans) on high differential pressure or low Row, the components shall be designed to withstand the tnp
point design pressu re plus a margin to include the rate of p re ssure ri -
se between reaching the press,.re selpoint and the time for the nstn:mentatlon
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es c n se.or 1 0 whi e fr e ver is greater. cote
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973 4.7 PPhysical location and arrangement ement of the components of a nuclear air-t reatment system in fl uence the requirements for leak lightness for the various
pa rts of the p re ssure bounda ry. Air Row shout be f ro m potentially less contaminated areas to potentially more contaminated areas. Whenever
possible, routing of co ntaminated air tnrougl clean spaces or inte rs pades should be avoided. If this can not be done. the general guidance In this
Section should be followed. Figures 8. 1 4 1C • ',8 - 1410 .2. and B•1410.3 of ASME AG-1, Section $ A schemaCcally depict examples of possible
combinations and location of fan and air-cleaning unit to minimize Impact of system Contaminated outieaKage on sur rounding risen s paces and
Inters aces as well as contaminated inleaka a Into a cleaners stem corn onent.
w'" EFFLUENT NUC12EAR }A1R=TREATaVlBh17`.5YSTEM'" ONE TNRt7l1GH , : f '' t, ` ^'fa;.t:fyv z' . " ^a " ^? r"