ML19220D076
| ML19220D076 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/02/1969 |
| From: | Howe P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Boyd R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7905160474 | |
| Download: ML19220D076 (7) | |
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S. Soyd, Assistant Diractor for Reactor Projects, D?1 THEU:
S. Lenne, Assistant Director for Eeactor Technology, CRL I'iPL7 TO }C*2C?CLITAN ZDISCN COMPANY - THIEZ )CLE ISLA'D ACES REPCIT
- DCCCET NC. 50-320 Attached is our input to the Metropolitan Edison Cc=pany -
Three Mile Island ACIS report.
iw 3 p P. fJ. Hove, Chief, Environmental &
RT-449A Esdf ation Safety Technology Branch I&2ST3: DPi:'nT3 Division cf leactar Licensing
Enclosure:
Ma t. Ed. AC25 2pt. input ec w/ enclosure:
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Site Charac teris tics The Three Mile Island Nuclear Statica Unit No. 2 (TMI 12) vill be locatad adjacent to Unit No. 1 en Three Mile Island on the Susquehanna River approxi=ately 10 miles southeast of Harrisburg, Pennsylvania, (1960 pcpulation 79,697). The site is located in Londonderry Tcvnship of Dauphin County, Pennsylvania.
2.1 Peculation Dis tribution The nearest residence to the site is 2200 feet east of the centain=ent building. The exclusion distance for the Three Mile Island site is 2000 feet. Based en the cc bined popula-tien of Middleton-Steelten ec== unities (22,450) with their nearest boundary at 3 miles, the applicant has proposed a lev population :ene radius of 2 miles, the same as approved for TXI #1.
The 1967 population within the proposed low population
- ene was about 2300, We believe appropriate protective.eaaores could be taken en behalf of residents within this radius in the event of an accident.
2.2 Meteorolcey In the absence of specific en-site measurements of neteorological characteristics at the site, we have ap) ' led the staf f model of Pacquill 7 and 1 =eter/second vind speed in calculating the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> accident doses at the exclusion radius of 610 maters (2000 feet).
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The applicant has es:L=sted site beundary atmospheric diffusien values for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> post accident period which are about S57. of the staff values. For calculating deses at the icw population :ene distance of 2 miles, we have acplied the same seteorological parameters used by the applicant. The para:eters used are based on Pasquill "F" conditions with absolutely invariant vind of 1.0 meter per seccnd f or the first 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
The sa=e vind direction was assu=ed for the follcwing 6-1/2 days but with Pasquill "7" and 1.0 meter /second 50% of that ti=e and Pasquill "D" with 4.0 me:ers/second the remaining 50%. For this second time period the wind direction was averaged over
- he 22-1/2 degree sector. For the following 24 days the vind was assu=ed to blev in the same 22-1/2 degree sector 50% of the time with 5% in the Pasquill "C" category with 2.0 meters /second wind speeds; 33 in the Pasquill "J" category with 4.0 meters /second wind speed; and 12 in the Pasquill "F" category with 2.0 meters /second wind speeds. Wind direction was averaged over the sa=c 22-1/2 degree sector. Our consultant on meteorology, ESSA reviewed the =eteorology data submitted with the IMI Unit No. 2 application and have ce==ented that the =cteoro-logical docu=entatien and conclusions are identical to that which were presented in the applicatien for TMI Unit No.1, and that their co==ents en Unit No. 1 dated June 19,1967, are directly applicable to the Unit No. 2 applicatien.
In its n
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. cc==ents en the Uni: No. 1 applica:ica ESSA concluded that the applicant's diffusion parc=e:ars used in the dose calculations are reasonably conservative. The ISSA con =ents have been f orsarded to the Cc=mittee.
The applicant has a program of on-site ceasure=ents to deternine vind speed and direction, and stability characteristics of the site.
Data collec:ed in this progra: vill be used to =ake a final deter =ination of the diffusion characteristics of the site, and vill be evaluated at the operating license stage of review.
2.3 Geolo2v Core borings shev that the fcundation cenditiens in sound bedrock underlying the site should be adequate for the proposed facility. There do not appear to be any extraordinary geologic engineering problems associated with construction of the TMI
e have been infor:ed by our geological consultants in No. 2.
the USGS that their conclusions based upon the TMI No.1 site gaology review are unchanged and no adverse geological conditions exist at the site.
2.4 Seis= ology 3ased upon the review of seissic history at the Three Mile Island site, the operating basis earthquake (OBE) and design basis earthquake (23E) were selec:ed to have a horizontal ground acceleration of 0.06g and 0.12g, respectively. The design basis p n,5 h / 'I
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- for TMI No. 2 will consider the 03E and D3E above with a vertical acceleration equal to 2/3 the horizontal acceleration.
Cur seis=ic consultants (USC1GS) concluded that the ground accelerations considered for the site are adequate based on their review of the site and the surrounding seismic histe c.
2.5,Hvdroloey The site is located on an island in the Susquehanna River jest above the York Haven Den.
Closed cycle cooling towers will be used to re=ove the heat from the =ain condenser coolinz vater.
Service water for the heat removal of other normal and emergency equi;=ent is supplied frem the river. A pcs t cooling tewer is used to reduce the service water and cooling tewers bicwdown water te=perature before being returned to the river low flew of 1700 cfs, equivalent to failure of the devnstrean York Haven Dam, would s till provide both units of nuclear service pu=ps a supply of 430 cubic feet per second. This minimum flew available to the nuclear service pu=ps is five times the flew required for safe shutdown of both units.
(Reviev Of the flooding characteristics of this site is incomplete).
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-S-2.6 Invironmental Menitorine Metropolitan Edison Cc pany has been conducting a preoperational environ = ental menitoring progra= since January 1968.
The progra=,
as described in the IM.I Unit No. 2 application, has included samples of well and river water, river sediments 'and fish, and soil and vegetation from the site area. A total of 84 samples have been taken in the program. The Metropolitan Edison Cc pany has met with the Health Depart =ent of the Cc=nonwealth of Pennsylvania regarding the program, and has subsitted their program to that agency for its review and recoc=endations.
We have not yet received co==ents from the U. S. Fish and Wildlife Service regarding the TMI Unit No. 2 application.
Ecwever, we have infor= ally discussed the application with Fish and Wildlife and have learned that they will, in their formal ec==ents, indicate the need for additional or clarifyhg information with respect to the environmental =onitoring progra=.
The staff also feels that additional informatien is necessary, and has discussed this with the applicant.
Infor:ation which remains to be resolved includes the type and location of samples of aquatic biota from the Susquehanna River and what studies have been cade to detarmine critical radienuclides and critical food chain pathways to man; mad the use of Susquehanna River water for irrigation and the possible need for monitoring of crops raised on irrigated land.
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STAFF CALC'JLAED ACCIDZ'iT DCSES Exclusion Radius Lev Populatien Zene 610 Meters 3200 Meters (2 Mi.)
"hyroid
'aaole iody Thyroid
'a' hole Body Steanline 3reak 74 (a)
(a)
Fuel Handling Accident 294(
9 (a)
(a)
Ste== Generator Tube 7a11ure 268(*)
3 (a)
(a)
Gas Decay Tank Failure 4
(a)
(a)
Loss.of Coolant 445(d) 7 287 3.0 (a)
For these shoru duratien accidents the low population zone dose would be a fractica of r. hose calculated for the exclusion radius and well belev Part 100 guidelines.
(b)
Based on failure of the 203 fuel reds contained in one fuel assenbly and en releaac of activity via charcoal filtered ventilation systems with filters 90: efficient for iodines.
(c) 3asec on release of activity centained in the 5650 cubic feet of pri=ary coolant dis' charged to the stean generator.
(d)
Based on 0.2 / day centainnent leak rate, and a 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> containnent spray syste= iodine reductica factor of 3.5.
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