ML19256D208
| ML19256D208 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/27/1968 |
| From: | Grimes B US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7910170706 | |
| Download: ML19256D208 (4) | |
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Ecger 3. Ecyd, /csistant tirecter Marc 1 2'T, 19C for Eeacter Prcjects, EEL THEU: Chrles G. Leng, Chief. EP3-3 2rian Grires E"2-3, "ivisien of Eeseter Licensing E*JC2 20, Ic63 lc mG WITd lGCPCLI'E" EEI2CU CH AIECPfJT CRASH EH ICT3 Ch lerch 20, 1963, we cet with Metrepelitan Edison to discuss pctential aircraft crash effects at the Bree Mile Island site. An attendanec list is attached.
The applicant presented preliminary design infer =atien en fire effects which vill be documented in A.aend:ent 10 te the applicatien. A single air intake fcr the auxiliary building and centrcl rocm is planned with a mini =u= length cf about 130 feet.
Since the velccity cf air in the intake duct vill be abcut 1000 feet per minute, several seccnds resetien time vill be available to detect and isolate the buildings from the air intate.
The cocbustible gas detectors vill censist cf two platinum vires, cne expened to the sir in the intake duct. A signal veuld be generated when the temperature cf the wire in the duet increased due to a ca calytic reacticn with the gas mixture. The detectors (a Jchnsen-Willia =s design was referenced) can detect gases at a level 20% cf trat required for an explosive mixture. A ceneentratien belev this Jevel could be breathed by the cperators fer a nt=ter of hcurs with-out detriment to health.
(Ite intake duct eculd be ennually isolated when the gas oder is noticed by the operators). The applicent stated that very little resetion time would he required since the wires are directly in the path of the air and are not dependent en a sa=pling
=echanis=.
The number and lecaticu of detecters veuld be such that stratificaticn of the gases vculd not prevent detectien. Fla:e detectors vill also be installed.
In additien to closing fire da=pers and air-tight valves in the intake and exhaust ducts, the senscrs veuld actuate a vater deluge system in the ducts. About 1 lb. of water per lb. cf air vill prevent combustion at any gas concentratien.
An analysis invclving general aviatien es well as ec=mrcial aviatien was perfer:ed to eveltate the prcbability cf having ec=bustible gases at the air intake er exhaust peints. Eecat se cf the s= aller target area, a recurrence interval cf 1C~10 was arrived at as cc= pared tc IC*D fer a larste ereft 1 rect envvhen en the fecilf tv.
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Reger S. Icyd te pctential fer cenerece spalling due to high flame te=peratures vill be discussed in the sub=ittal. Eis is net thceght to te a prcble= by the applicant because cf the thickness of the cenerete valls.
he auxiliary buildirg lever flecrs vill te protected frr,c fuel ent:/
frc= the upper, unprotected level by prcviding a water seal in lincs which vill not be filled with water and by velding flat plates ncr sl to the pipe which extend into the tuc-fcct-thich ecnerete ficer.
Se largest line which penetrates the ficer is tvc inchea in diameter.
The stairvells are protected frca i= pact by shielding and frem fire by fire decrs.
The diesels are prctected frem = cat secendary missiles by abcut cne fcct of ecccrete and frem fire effects by a water deluge syste in the air intakes. Althcugh the diesels cculd not take a direct i=; ec t, they are separated from the eff-site pcver scurce by several hundred feet. Even if bcth pcver sources were Icst, the plant cculd survive withcut any AC pcver fcr several hcurs alleving time for pcver to te restcred. te veter deluge system vill be fed frc an elevated tcver er alternately frc= a ;rctected diesel driven pu=p taking sucticn frem the cooling tower tesins.
Mr. J. Haley cf Aviatien Safety Engineering and Eecearch (rynamic Sciences Ccrpcratica) presented his calculations en the characteristics of the lead applied to the centain=ent frem the i= pact of a large plane. His results were cbtained frem a =c=entum exchange calculaticn and are primarily dependent en the impact velocity and the = ass per unit length. Ee method was checked by cc= paring it to a test crash cf a 53,Cc0 lb. plane into a vestical vall at 123 knots. Ee results cf the calculatien indicate high "g" Icedings en the centainment (60 te 7Cg) and the shape of the Iceding curve is si=Onr to that which Mr. Prceter cttained frc Lcckheed.. (Mr. Precter said later that ha vas basically satisfied with the =ethed cf 1 cad applicaticn. )
Preliminary results cf an i= pact en the dcce apex with the nev leading vere satisfactory fer the 2CO,CCC lb. plane but shcwed pcssible failure fer a 3CO,CCO Ib. plane (707) which the applicant had previcusly specified as the design basis. te applicant intends to make a =cre sephisticated calculatien in which the leading is applied at three peints rather than one but this =sy take six =cnths.
Mr. Ecddis indicated that the design baais might be changed to 2CO,000 lb. which vculd cover all aircraft "cv flying except the 707 class. We said that we cculd take no pcsitica en the acceptability of the prepcsal at that tire.
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Peger S. Ec'I.
'n'e suggested further calculaticna to shcw the capability cf the re3+ c' the structure relative tc the dcne and to shev that the juncticn c:
cy..nder and dc=e ses net a critical 1ccaticn.
Xr. leve had the felleving statistical infernaticn:
II) c].lessthan45 degrees,cnecccurredduringheriental seven large air carrier Cr33hes, ferr vere at angle
.11cnt and two were at angles between TC and :C degrees.
(2)
Crdy cr.e crash cf a large plane was at a speed as high as 200 kneta (nest were 130 to 170 k= cts).
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Attendance List Distributicn:
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.-s Heaa Sele Fcrlovit: - Consultant en Fire I'fects Jo.. Jh "-' ley - Aviatien Safety Engineering & Research of Dynamic Science Hans derick Wolfgang Lcren:
Frea 4 alter Sy=cns Ca.rrol Herbert 3itting Duane Aubrey Gcdfrey Sunner Willard Reid Jorge Daniel Biera Willia: 3ryan Shields Metropolitan Edisen Cc=nany Georg; Fi1= ore 31ernan John Gwaltney Miller Ralph Edgar Neidig Louis Harry Roddis, Jr.
Richard Wea=er Heuard, Jr.
Pickard. Love and Asscciates William Webb Love Shaw. Pitt=an. Potts. 'freubridge & Madden Gerald (none) Charreff AEC C.G. Lcng, EP3-3, EFI 3.K. Gri=es, EP3-3, IF1 J. Proctor, Naval Crdnance Latera: cry P00R ORlGlNAL