ML19345D617
| ML19345D617 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/28/1980 |
| From: | Kocen S AFFILIATION NOT ASSIGNED |
| To: | Hendrie J NRC COMMISSION (OCM) |
| Shared Package | |
| ML19345D616 | List: |
| References | |
| NUDOCS 8012160258 | |
| Download: ML19345D617 (3) | |
Text
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7814 So. Kenton Chicago, II., 60652 October 28, 1980 Mr. Joseph M. Hendrie Me=ber, Nuclear Re;;ulatery Commission 1717 H Street, NW Washington, D. C. 20555 Re: Article in March,1980 issue of Scientific American (page 53)
THE SAFIIY OF FISSION REACTCRS Author: Harold W. Lewis, Professor, Department of Physics, University of California, Santa Barbars, Ca., 93107. Member NRC's Advisory Coccittee on Reactor Safeguards.
Dear Mr. Hendrie:
Subject article lists the following train of events as leading +4 the accident at the Three Mile Island nuclear power generating plant:
(a) tripping of main feedvater pumps (b) a pair of block valves which should have been open, had inadvertently been left closed (c) failure of primary-system relief valve to reseat, with the consequence that operators were misled into compounding the situation.with human error The accompanying material destibes improved means for reducing likelihood of future nuclear power generator accidents resulting from pump or valve failure.
Since the Nuclear Regulatory 4mmission is charged by lav vith the responsibility for safety of nuclear power plants, the agency (its members) may wish my permission power reactors and/peration with public utility companies presently operating nuclea to conduct, in coo or with firms engaged in constructica of nuclear reactor plants, tests to evaluate effectiveness of my invention in enhancing nuclear reactor plant safety. Such action vould be in accord with thrust of congressional legislative intent which created the NRC and with subsequent presidential directives.
Please advise if such permission is desired.
7 7 truly yours, 9
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oCen Copies:
Identical letters to all members NRC Letter to Sen. Henry Jackson, Chan Senate Energy Committee Letter to Rep. Donald Fuqua, Hcuse Science and Technology Committee Letter to Rep. Michael McCormack, House subconnittee on energy research and production Letter to Dr. Frank Press, Office of Science and lechnology Policy Letters to various government official:; (both state and federal)
Letters to various publications and various organizations 8012160 25I
INVECICN OF DEVICE FCR IMPROVING SAFrY IN NUCLZAR PCVER G2iERATING PLA:CS BY PERMIMING MCP2 EFFECTIVE MCNITORING OF TD9ERATURE RISE CR LCSS IN REACTCR VESSII., PIPES, CC.
Do ieo besiedly censists of a photoelectriedly responsive etector of i.fr red r..distion. Lens (or other response element) is focused upon reactor vessel, pipe, etc. to be nonitored. Tempernture increase within ree.ctor vessel, pipe, etc. heats up contcin=ent valls, causing chenge in external infrared radiation, which in turn causes change in monitor unita's electrical output. Such outcut changes (which obviously nay be amplified) motivates change in position of a disl needle, solenoid, etc., which in tun acts to open or close electrical circuits designed +4 octiv:te "Alam appropriate visua*/aadihle alarm signals and/or corrective centrcl systems.
points" can be set to indicate unen reactor vessel, pipe, etc. is either hotter or ccider than desired.
Monitoring by calibration of infrsrod reading output offers the advan+ ages of:
(1) physical detachment of monitoring unit (temperature reading device) from reactor vessel or pipe being menitored, and (2) speed and exactness of reading.
If such device had been in use at Three Mile Island, monitoring of infrared radia-tien anitted by reactor vessel and/or pipes veuld have furnished operators with additienal infor=ation regarding need for cooling water.
@ 1980 Samual Kocen, 7814 So. Kanton, Chicago, Ill., 60652 I
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- s she'::, I have dded safety alment er =cter whid say be shaped as a blade
.er vane, :: :37 o+2er :ppre;rists share. The ;re:=ure of water Coving to the ri;ht overe :ss resist::ce offered by s ring 3, forci g thWvsne tevard *2e rigat so that it touahes :ent ct ;cint(s) 3, :1: sing = electriesl cirnit whid by appropri2*e si;;ncis (?refortbly virad) infer =s operater(s) th?t voter 7 73 is Ocving prensrir teutri *2e right.
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M If fer =7 reasen (7=; er velve is11=e, etc.) vater is ;,11 Coving in desired direc.icn, blaipvane is =:ble to over::=e resistance of spring S and as shevn r *-* st(: is f:::2d by :pring S to re =n tc);ositie A, uhere it tou:hes c=t:ct point (s), ce=:letis; :n electrical cirnit utich by sp;ropriate signals
( ref er.:17 vi:::1) alerts o;erstcr(s) to fact that water is gol flov6g (which may be desired condition). 71ov 6te r ecial_ahst;u-t_;1;e_ a;uignsLys.lv, le,ak.
I A turbine wheel of approprhte size :ty be substituted for bladdvane referred to above, g
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sud t=the iteel having appr:7 inte cont:ct points: seans being provided for stops to t
li=it degree ;f rotation. 'thile have indicatad use of a sp&.g S (preferably calosed i
vithis a container rade of m bber, plastic cr other =aterial not affected by th9 fluid ropriate material-(air, oil, etc.) may be l
- or gas b which it is *==ersed), sc:e other app / return capacity as a spring.
used to perf: m the sa=e f= cti:n of resistance Py inventien, while not directly indicati:g f=ctioning or =alf=ctioning of pump, valve, etc., does previde r pid int:m: tion as to whether vster/ fluid /gss is flowing (fig. 2) er is not floving. My invetion is not restricted to use in =uclear power generstors or to water flev, but = 7 also be used in other industries in ectnection with Cuids or gsses of :37 21:1 Ter e==ple, in hydraulic systes of airplanes. Uithout =7 hvention, a pil:t ::7 Tai:kly reeli:e that ving Caps :re not responding properly to controls. yer-
= 1 ts.ic:cy is to =c=cnt:rily centi ue ud.:ing the centrols is an attept to fcree proper cperstice. If =7 inventi:n has been incerpcrated in*e hyd::ulic r/ste, pilot is i==ediate, 17 alerted to fedty ceniitic of h-dr -di: syste (Cuid not Coving, whatever the reascu j
be) =d instua of ut: tin: ;rsei:us accents attempting to get proper response fres cen-
- 7 trols (fi;ht the controls) cas :ere Taickly take action indicated by existi g c6tditions.
l O briously =7 inventien c= to used to indicate stat particular section of a conveying l
syste (such as potreir= pipe line, irrigation syste, etc.) may be = alfa :tiening.
I Snares below re resent ale = lignts in a tuo rev systers. All thb top rev lights are vired to +2e "is Covi:g " cir=its (3, fig. 2). All bottom row lights are vited to the, "not l
Coving" circuits (A, fig. 3). 31=;17 glescing at. the tuo rous would alert operstor(s) to the fset that Cov had cessed in a given sectics - - the first section for which upper l
row light (indicating "is Coving") would be out, while bottom rov light (indicating "not Coving") would be on.
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res ao cLs.4 Mo 4s.s st.T #f N 88 fld*5 Issence of ::7 inventi:n is *2At pressure of Coving vater /staan/Cuid/gss/ air ferees a
=ovable me=ber to a designated position (stops say li=it travel of member). Means for retun of =cvable =enber to origin:1 or ano.ther position if Cow fails; means for acti-vsting electrical signal circuit st designated " Coving" or "not flowing" positions of movshle member (bladdvane, etc.). My inventi:n covers flow infor:ation signaling sys-te; n=t pressure release systec.sn Gu f 7.y of Flaw in @q OF new @-ftm.
e I, Samuel Kocen, inventor of above described brention, retain right grs.: ted by patent law to file patent application on or before October 1,1981, said date being within one year fres date of publication (October 7,1980) of description of this invention.
@ 1980 Samuel Kocen, 7814 So. Kanton, Chicago, Ill., 606524 KW M
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