ML20234E039

Preliminary Draft Rept on Special Requirements for Earthquake Resistant Design

ML20234E039
Person / Time
Site:	05000000, Bodega Bay
Issue date:	06/29/1963
From:	Williamson R HOLMES & NARVER, INC.
To:
Shared Package
ML20234A767	List: IA-85-665, Discusses Seismic Design of Nuclear Power Plants,Including Const of Nuclear Plants in Seismically Active Zones ML20234A761 ML20234A769 ML20234A792 ML20234A798 ML20234A803 ML20234A812 ML20234A816 ML20234A827 ML20234A830 ML20234A838 ML20234A841 ML20234A844 ML20234A847 ML20234A851 ML20234A855 ML20234A858 ML20234A861 ML20234A864 ML20234A868 ML20234A871 ML20234A874 ML20234A893 ML20234A896 ML20234A900 ML20234A911 ML20234A922 ML20234A929 ML20234A932 ML20234A937 ML20234A944 ML20234A956 ML20234A965 ML20234A968 ML20234A976 ML20234A984 ML20234A993 ML20234A996 ML20234A999 ML20234B005 ML20234B008 ML20234B023 ML20234B032 ML20234B035 ML20234B040 ML20234B062 ML20234B066 ML20234B076 ML20234B084 ML20234B098 ... further results
References
FOIA-85-665 NUDOCS 8709220267
Download: ML20234E039 (4)

Text

i opgfjf5

. ~, .

P R E LIMIN A R Y D R A F T-SPECIAL REQUIREMENTS FOR EARTHQUAKE RESISTANT DESIGN ,

I. The general approach should be a systems analysis in which all com-pvoents at a system which perforrns a critical function are evaluated for their shock resistance. This evaluation would apply to all features regardisse of whether they are classifie:s in structural, mechanical, electrical, or other categories. The design should insure triat the integritf of a crit: cal system is not jeopardtsed by a malfunction of other relatso systems.

I l

l

2. It should be demonstrated that complete load paths are provideo such j i

that all forces can be carrled through transmitting elements to those l parts of the structure or soll where it is evident that the stresses a r * ** 511gtble. The adequacy of all such transmitting elements j should be comonstrated, s i

i

3. Effects of differential movement should be properly accounted for in all cases such as conditions at penetrations, interfaces, and at Laterconnected equipment items capable of vibrating out of phase.

I B709220267 651217 PDR FOIA FIRESTOBS-665 PDR ,,

t

.z.

4

]

i

4. The design should properly ascount for the sifest of seismically tuduced surges act.ng on fluid cantainers and elements theretn.

H i

S. Substantiation of shock resistance of equiprnent itame could utillst one or more of the following, as appropriate to the case at hand.

4 i

(s) Performance history of such equipment under shock loadings. l 1

(b) Raview of crawings or pratotypes representing typical J

components.

(c) Analysis based on conservative assumptions. l (c) Results of sh.>ck tests. Testa could be performed on the component itself or reference might be made to existing test cata on components sufficiently similar to justify the use of such data.

(e) Dynamic samlysis of the response to the shock input.

6. As a minimum, the shock input for destga of equipment items should consist of the spectrum (with appropriate damping) representing the basic ground motloa. in cases whers it is apparaat that the motion of

t the supports is essentially that of the ground. Where ths support motion differs appreciably from that of the ground, this fact should be accated for in the analysis.

7.Section V D (pg. V-4) of the Preliminary Hasards Summary Report enumeratos components considered to be la the category of Class 1 structure s. It is canaldered essantial that this enumerattom be regarded as including components such as the following detailed Iteme, along with associated supperts, controls, instrumentation, and circuitry.

(a) Valves, penetrations and seals involved in the contain-meat system.

(b) Power and water sources, pumps, prirne movers and piping of the emergency cooling system.

(c) Meter-generator set, fuel supply and piping. One or more backup units should be seriously considered unless i

power sources of adequate sapsetty with equal or better  ;

re11r.bl11ty are available, j l

(d) Station battery power system.  !

j

.. . , . . . .s..

t _d..

(e) Liquid poison Lajestion system.

(f) Core support structure.

(g) Reacter vesset supports.

i (h) Contral rods and drive system tactading piptag and appurtenances and accurmulateve. Special attention should be paid to the -

functiontag of the sollet fingers la the control rod drives. It I is also considered important that the rod drive control system i

be provosted from inadvertently persnittlag red withdrawal, and that the seram damp valve'and its controls be designed i

to fail in the damp ruede. The fael elements and control rode I

should receive a dynamic analysis. ,

1 (i) Reactor safety and sentrol system. I (j) Fuel storage pool.

(k) Steam and feed water 11 ass betwoon reactor and turbine.

RAW /ew  ;

1 1

5

? s s

E ,. . . - - . - _ - . . , s , ___ ,, , ,