ML19224A961

Miscellaneous Chronologies & Comments Re TMI from 790328-31

ML19224A961
Person / Time
Site:	Crane
Issue date:	03/31/1979
From:	Office of Nuclear Reactor Regulation
To:
References
OLS-790331, NUDOCS 7906130295
Download: ML19224A961 (45)

Text

.

50-320 Miscellaneous chronologies 3/28/79 - 3/31/79 7906130295' r

179 245

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3 3/28/79 g

4:00 a.m.

Unit at 98% power 5/ ^ l Secondary pumps tripped due to a feedwater Dolishing problem.

g, d', 1 -

Tr:is resulted in a turbine trip and subsequent reactor trip on High Reactor Coolant Pressure.

5/;de 5 A combination Feed Pump Operation and Pressurizer Relief-Steam t 'dMe~((7l Generator relief valve operaticn caused a RCS cooldown.

/s At 1600 psig Emergency Safeguards Situation occurred.

All ECCS components started and operated properly.

Water level inci esed in the Pressurizer and Safety Injection was secured manually approximately 5 minutes after actuation.

The RCS oumos were secured when icw NPSH limits were approached.

7:00 a.m.

High activity was no'.ed in the RCS coolant sample lines.

A si+.e emergency was the declared.

7:30 a.m.

General Emergency was declared.

7:45 a.m.

Licensee notified Region of the incident.

8:10 a.m.

Region Operations Response Center activated.

8:35 a.m.

HQ Operations Center activated.

8:43 a.m.

Region I Response Team dispatched to site.

s#r-f r1 ye

• r 10:05 a.m.

Response Team arrives at site.

3:30 p.m.

The plant is being slowly cooled down with RCS pressure at 450 psi, gj,.,/, C using normal letdown and makeup flow paths. The bubble has been collapsed in the A RC Loop hot leg, and some natural circulation cooling has been established.

Pressurizer level has been decreased to the high range of visible indication, and some heaters are in operation.

179 246

=

The secondary plant is being aligned to draw a vacuum in the main The facility condenser and use the A Steam Generator for heat removal.

$Y' < ~ plans to continue a slow (30F/hr) cooldoun, until the Decay Heat Removal System can be placed in operation at 350 psi RCS pressure, 3500F RCS temperature in 15-13 hours.

As of 3:30 pm, a plume approximately 1/2 mile wide ana reading generally The ARM,s helicopter is g/; Jg7 1 mr/hr was moving to the north of the plant.

Airborne iodine levels being used to define the length of the plume.

of up to 1 x 10-8 uCi/ml have been detected in Middletown, Pennsylvania, which is located by plant personnel.

L Cecision was made to open the Electro Meerrtic Relief Valve to 4:31 p.m.

depressurize.

.uop into service - produce steam - natural circulation 4:47 p.m.

Plan to -"' "

and cool primary down to a point that the hHR can be put into service.

Eary Miller - station super at site plus 6 of unit supers.

Just starting to steam on the A SG. Vacuum was established,at the 5:24 p.m.

condenser of 15".

Valve between SG and condenser is not opening - steaming has not 5:39 p.m.

really started yet. Sending someone to investigate.

Started steaming from the "A" SG. SG dropped slightly - using some 5:50 p.m.

nakeup water.

Steaming in'A'SG continuing - Plan to raise primary system press to 6:02 p.m.

2000 psig to collapse any existing air / steam bubbles.

i79 247

3/2B/79 f

CoteEMTS The combination of RCS cooldown and loss of steam through the pressurizer 4:00 a.m.

relief valve resulted in shrinkage of the primary coolant until the water dropped out of the pressurizer, and voiding occurred in the balance of sl.,k3 the primary system.

Apparently the reactor coolant pumps were stopped before enough water Sb la %, had been cumped into the primary system (by th voids in order to prevent damage to recirculation pump seals.

With the primary pumps stopped, the voids collected in the primary ccolant loops at tne highest points in the system, the tops of the steam generators.

These voids result in loss of natural circulation in the core and (probably) iradequate cooling of the fuel and possible fule damage.

At scre later time ECCS was restarted manually in order to improve cooling f,e x E to the reactor core. Up to 500J pm of water was pumped into the primary (These system through the High Pressure Coolant Injection (HPCI) pumps.

are the same as the makeup pumps.J

</ac h u ~ d e 5 team venting was accomplished by opening the hem +e relief valves on This steam blows down to a tank in the containment.

top of the pressurizer.

When the capacity of this tank is reached (after a very short time) the 3 // & ' steam is vented directly into the containment, where it is condensed, the

/ 7 resulting water flows into the containment pmp where it is available for recirculation to the primary system.

The source of the HPCI water is the borated water storage tank which is 179 248 6

required (b echnical specification) to contain at least 350,000 gallons of borated Over 140,000 gallons of this water was pumped into the primary g

system.

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WASHINGTCN, D.C. 20555 g

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- m3 Numrtets n.a mm *I.*r 'e%+3 No.

79-65 FOR IM.EDIATE RELEASE

Contact:

Frank L.

Ingram (Wednesday, March 28, 19 79)

Tel.

301/492-7715 NOTE TO EDITOPS :

The inforr.ation below was inaued at approximately 5 p.m.

EST.

The ':uclea r Regulatory Commiss ion has received additional infor atica from its inspectors at the Three ' tile Island Power Plant in Pennsylvania where an accident cccurred earlier today.

This updates the NRC.,nnouncement

..de earlier today.

No injurieu have been reported.

Lcw icvel. o f radiation have been measured off the plart site.

The mximum con firmed radiation reading was about th:ce millircentgens per hour about one-third mile from the cite.

At one mile, a reading of ena millircentgen per hour was measured.

It is believed that this is principally direct radiaticn coming from radio-activo material within th e reactor containment building, rather than frcm release of radioactive materials from the containment.

Extensive efferts are continuing by the State of Pennsylvania, the Department of Energy, and the NRC to the arount of radioactive macerial which may have been meesure released from the sit;.

A helicopter with special instruments also is being used.

It now appears that the cause of the turbine shutdcwn at the plant early today was a reducticn in flow of fecdwater to the steam generators.

The. sequence of events which led to the release of radio-activity to the reactor containment building has not been deter: lined.

There was a release of primary coolant water to the containment.

Emergency core cooling systems are continuing to provide water to cool the fuel.

The reactor is shut devn.

<The pressure in the reactor system is being sicwly reduced.

NRC has a team of six persons at the site.

They will participate in the NRC investigation of the event.

The results sill be made public.

An NRC team alco is being formed to monitor the subsequent activities of the licensee, the Matropolitan Edison Company.

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3/23/79 10:20 AM The Nuclear Regulatory Commission has receivet. preliminary infor-ation cn an emergency situation at the Three Mile Island Nuclear Power Plant near Harrisburg, Pennsylvania. Thera has been a release of radioactivity inside the reactor containment system. Measurements are still being made to determine if there has been any radioactivity detected off the site. There is no indication of release off the site at this tire. "strcoolitan Ediscn Company, cperator of the Dlant, has reported that tre turbine of Unit 2 at the olant tripped off early this morninc, cicsing off the steam ficw from the reactor to the turbine. Tne cause is not kncwn at this time. There was a release of primary coolant water into the containment. The emergency core cooling systems are being used to provide water to the reactor. The Unit 2 reactor is shut down; Unit 1 ct the plant is shut down for refueling. NRC has dispatched a team frca its Regicnal Office at King of Prussia, PA, and they will be at the site shortly. State and other Cederal agencies have been notified. 179 254

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~. Q 2 &1 4,r.G i L/.<JCr.j/ V W 4:00 a..m. Unit at 98% power 5 / "<[sa Secondary pumps tripped due to a feedwater polishing problem. C' - This resulted in a turbine trip and subsequent reactor trip on High Reactor Coolant Pressure. M A combination Feed Pump Operation and Pressurizer Relief-Steam bC# ' Generator relief valve operation caused a RCS cooldown. At 1600 psig Emergency Safeguards Situation occurred. gp' All ECCS components started and operated properly. Water level ir. creased in the Pressurizer and Safety Injection was secured manually approximately 5 minutes after actuation. i The RCS curos were secured when low NPSH limits were approached. 7:00 a.m. High activity was noted in the RCS coolant sample lines. A site emergency was the declared. 7:30 a.m. General Emergency was declared. 7:45 a.m. Licensee notified Region of the incident. 8:10 a.m. Region Operations Response Center activated. i 8:35 a.m. HQ Operations Center activated. 8:43 a.m. Region I Response Team dispatched to site. "#' - 16 y Ur 10:05 a.m. Response Team arrives at site. The plant is being slowly cooled down with RCS pressure at 450 psi, 3:30 p.m.

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using normal letdown and makeup flow paths. The bubble has been collapsed in the A RC Loop hot leg, and some natural circulation cooling has been established. Pressurizer level has been decreased to the high range of visible indication, and some heaters are in o;:eration. M 179 258

The secondary plant is being aligned to draw a vacuum in the main condenser and use the A Steam Generator for heat removal. The facility II' plans to continue a slow (3oF/hr) cooldoun, until the Decay Heat 1 Removal System can be placed in operation at 350 psi RCS pressure, 350cF RCS temperature in 15-18 hours. M 3:20 p, a plu= approv'

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1-arfiu nas moving to tne nut-Lir-ob9a n1'n' na We "e!'coM M s beifig-uced ta-d:f f.c the-length-ef-the-ph 1* - -M. '.... ' s .cl e,.H.e 1,.10-: ChWkave ceen detected in MiiMIL,,a, ~ Pennsylvania, which is located by plant personnel. d :c. 4:31'p.m. Decision was made to open the Electro Mag d e Relief Valve to depressurize. 4:47 p.m. Plan to put A-loop into service - produce steam - natural circulation and cool primary down to a point that the RHR can be put into service. Eary Miller - station super at site plus 6 of unit supers. 5:24 p.m. Just starting to steam on the A SG. Vacuum was established,at.the condenser of 15". 5:39 p.n. Valve between SG and condenser is not opening - steaming has not really started yet. Sending someone to investigate. /tvLl 5:50 p.m. Started steaming from the "A" SG. SG dropped slightly - using some makeup water. 6:02 p.m. Steaming in *A SG continuing - Plan to raise primary system press to 2000 psig to collapse any existing air / steam bubbles. 179 259 ,muy*--- m---

6:35 p.m. A-loop appears to have little natural circulation. Indications are that some of the bubbles are collapsing. 7:34 p.m. License has bumped the RCS pump - results appear to be successful - not positive confirmation yet. 7:36 p.m. RCS pump seemed to have pumped successfully for the 10 second bump SG pressure went from 20d to over 200#. Have to wait 15 minutes before bumping the motor again. 7:49 p.'. One RCS pump in A-loop has been reported as running - estimates are it will continue to run. 7:52 p.m. RCS pump continues to run, looks like normal cooldown wita one pum; will provide. 9:11 p.m. Mobile lab on site and is getting set up. 5:15 p.m. Tc-310 TH-? No bubble yet. Pressure 1050 - Temperature 5200F Problem with aux. boiler solved and vacuum back on " Hot Well". Cool down going well and normal. 9:49 p.m. Licensee is now venting through the aux. bldg. vents. e 179 260 10:00 p.m. Cooldown rate has new been established at 80F/hr. 10:04 p.m. Licensee reports he now has PZR level indication and a bubble ~has been established. 11:04 p.m. Loss letdown flow. All waste tanks are full in both units. 11:13 p.m. Approximately 200,000 gallons of water in the aux. bldg. to get rid of. 12:01 a.m. PZR Pressure - 1010 psig Tc-292 PZR - Temperature 5500F tio let down established yet. 12:29 a.m. PZR Pressurr. - 1066 psig PZR Temperature - 554cF Tc - 291oF Planning to open bypass valve around the let-down valve. 4:30 a.m. PZR Pressure - 980 psig TCA - 2E60F PZR Level - 363" PIR Level - 545 ~..,. 7

• ! l Waste transfer started to Unit 1 neutralizing tanks.

Approximately 70.000 gallon capacity left in Bleed Holdup tanks. 5:45 a.m. PZR Pressure - 957 psig TCA - 285p PZR Level - 350" PZR Level - 542 TCS - 2850 SG A Pressure - 33 SG S Pressure - 38 Attempts to open PZR spray valve has caused increase in PZR level. Steam Generator A - Two Bypass valves are wide open. Bleed holdup tanks have 75,000 gallon capacity. Relief Valve Letdown flow - 25 gpm. Incore Thermocouple readings 207-6170 - Profile available. 5:45 a.m. PZR Pressure

98 psig TAC - 284

- 366 PZR Temperature - 535 179 262 P i TAB - 284 SG A Pressure - 32 SG B Pressure - 37 ) Tried spray, however, pressurizer level ircreased 17" in 1 15 to 20 seconds. Observed restriction in letdown flow. e 179 263 e e- -wa

COMMENTS I 4:00 a.m. The combination of RCS cooldown and loss of steam through the pressurizer, i, :: eda relief valve resulted in shrinkage of the primary coolant until thejncer. ot/e,p.,r a Jl:dt-$, dropped out of the pressurizer, and voiding occurred in the ! A w of ]

• he primary system.

Apparently the reactor coolant pumps were stopped t.;T;r; :c;.J. nw:r be w. pc. e E e e 1 e n hM-t ;;r. p.mped i t - the{p+3 9- ;.7 stem. (by A)/G!A Sb k [w ECC5) w wilapWhe ...e vo44s--i n--orde r--to p-evn

• damage-to-recirculat-;on pump-seah.

j rer y With the primary pumps stopped, M voids collected in the primary coolant 1ccps at the highest points in the system, the tops of the steam generator These voids result in loss of natural circulation in the core and (probabl3 inadequate cooling of the fuel and possible fuTe, damage. At some later time ECCS was restarted manually in order to improve cooling 3,. er h to the reactor core. Up to 500j pm of water was pumped into the primary system through the High Pressure Coolant Injection (HPCI) pumps. (These are the same as the makeup pumps.) a/<:ir u ~,{c Steam venting was accomplished by opening the e'd. ;.-dc relief valvef on top of the pressurizer. This steam blows down to a tank in the containment When the capacity of this tank is reached (after a very short time) the rupiuae di.:. fa.1la w h.'c4 2 6 /i c(e-steam is vented directly into the containment, where it is condensed, the S.s*H4ptcr n;ns -into th e ~ ants u....t:c.ty...,; ahere-it-is-awa-Walde-for-recirculTrion-to-tne primary 4ys.'am. The source of the HPCI water is the borated water storage tank which is 174 264

required (by, technical specification) to contain at least 60,000 gallons p.v i of borated Over 140,000 gallons of this water was pumped into the primar 4 system. M e 179 265 ~

l Within Facility Rx. Bldg. dome 20,000 Rem /hr. Aux. Bldg. I to 10 Rem /hr. Max dose to individual - at Northgate - outside of shelter <500 mrem annual limit for individual in population) estimated approx. 100-200 mrem _COLLECTIVC COSE Ascr0x. 123,500 perscns in three northern sections within 50 miles. Accrox. 2,000 man-rem COLLECTIVE COSE-FIRST CAY. Acarox. 1"< of annual CCLLECTIVE dose due to natural bkg. J 0 DINE _ Cne milk sample taken from plume area 21 DCi/I Icdine (" A lacci/I) F A Protective Action Guides-12,C00 pCi/I - remove cows frcm ;asture 120,000 ;Ci/I - control distribution of -ilk 179 266

Offsite measurements of radioactivity have been monitored continuously I by federal (NRC and DOE) and state personnel since 9 a.m. on Wednesday, March 28,1979. All of these measurements (air, water, soil and vegetation) indicate that there is no immediate threat to public health and safety. The offisite airborne radioactivity is determined to be almost exclusively from noble gases - primarily Xenon-133. There has been small amounts of iodine detected in one of several milk samples. The offsite airborne I radioactivity has resulted in minimal exposures to the public in a northerly direction from the plant. The exposures in the air, as measured by a helicopter, are about 0.1 - 0.5 millircentgen per hour. Natural background is approximately.02 millircentgen per hour. The highest ground level measurements offsite (about 12 milliroentgens per hour) were measured at about two miles north of the plant. These levels would result in exposures of only a small fraction of the Environmental Protection Agency's recommended protective action guidelines (1000 milli-roentgens). There have been no known releases of liquid radicactivity. 21 picocuries/ liter (MDA is 14 pCi/1, FDA protective action guides for peak levels - 12000 pCi/1, remove cows frcm pas ure; 120,000 pCi/l - control distribution of milk) 179 267

Status of Dil 2 Incident - 6:00 a.m. 3/29/79 (L. Barrett) i y,/< No detectable radiodines ir air samples. MDA lx1019 uci/ml r(, r /5.,, n, State took 6 milk samples 0 approx. 20:00 3/23. Samples were from around the site with the sample taken approx. 5 mi. NW indicating 21 pci/1 1-131. Cow on stored feed and in barn. No detectable iodine in any other samples which was expected because plume was toward NNW-NNE. Region I stated that no apparent steam generator leakage. Air ejector monitor reads bar. ground. Unit 2 vent monitor off scale. Background at monitor 540 mr/hr makes monitor useless. Unit i vent monitor indicates low releases from Unit i., Unit i release concentration lx10-6 uci/cc iodine and 3 x 10-' uci/mi particulates. 34,000 cfm exhaust rate. D'nr ww O;,- j 'y p1 Ym.:, v [ v / / h4 de t. on pw- '2 # 7 h \\q9 2f\\ I i 9tpfchy.f5MR e 6

O r jg 4 7., CHRONOLOGY OF iMI-2 ACC3 M.NT 7f UNTit. CORE C00LlHG RESTCRD E wEstsDAY MARCH 26, 1979 .F.1 C._UE E. TtME EVENT 1 L:00 r, 36 see Loss of Coede: sete Pump Loss of Fee h ter 4:00 + 37 sec Turbine Trip 1 Turbine Trip - Ele-ttnrac k ret %f vale coens (2755 3-6 sec psig) to relieve pressure in F.C5 ? 9-12 sec 't c e:t o r trip ;n ni gn cr ::,ure (? 3 L: 05i9) I i2-15 sec RCS pressure decays to 7705 psi 9 (POV sbcuid have Cl ned) 2 -13 se: 4CS hot ler. emp s tire :eaks at 511.1 F anc 510. 9 F /, v.rm e of 2150 05: 3, 0 L50 osis ever w. n a t i on ) 2 i L6. 9 n : 9 10 -30 sec Event recordee e w s 2A no 23 started at s c:.1 *1:=,- n :.=:bine trio. F.v=rc start-d up at + f:.1 ! s e 1% -f 0 see Pressurizer levei 'ndication beg' s to rise J ',6

• l 4in il appears *.h.T f; 4 Ste6n Generstor*. A and 3 are essentially dry

~ 4 7 m i n T-2 S e c ECCS initiation iMPil at 1650 psig I L L-I2 min Pressurizer l e ve? O f f s c.a i e - one HPl pipo (P(C) c: ippec at + 4 ::In 38 sec, Second MPI pum ('!4 t r s;ed at + 10 min 24 sec !2 +6 min ROS flohes as cressure bottes out at 1350 psi (Hot f eg ree persture of $$407) 4 -6 min Pressuria r levei inoication is off scale hicA 179 272

2 tCURE TIME EVENT +7 min 29 sec Reactor 6ur f ding semp puma en 10 +8 min Aux, feedwater flow is initiated by cpening c, '<ed valves k;5 11 min 43 see (Ka ke up Pump P I A 'CCC3 flog HPI) re-started by operator > 8 min i8 see E Steam Generator pressu.rs reached minimum. 8 min 21 sec A s t e am gene ra t:r p r-2 s s u r e s t a r t ed t o recover af ter that + 15 mitt R0 Drain Tsak dia;nragm ruptures at 193 psig due to cont!-;ad dis:barg: thru elect (ematic reistf valve. 11 73 min Operator 'c rips RC punps in Lecp 3 (Pung vib rat i on and reductico and os-ci11ation in t ono fl ew 'ad b-en obs e r v ed). ~ I hr 40 min C;erator tri; 'O :.u cs in Lcca A (Par: <ibration ano ccuct:nn nr: 7s-cillation in icep 'ies 5sd been neserved). Ik at.3 hour (est) CRE BEGl'il HEAT J? T;ANS IINT - Ng t !c t =coe ra t u r e be g ss t o r i s e t o 6 ti"F (off scale) and told let terr.crature regins to drop to I5!hr (h?t aater} +2.3 hour (est) FCY (wc believe tnis is :ressur!:er j porer cpers red re i ; e # valve) solated by operator af:er 5.0.-0 isolated to prevent feakage 19 +3 hour RCS pressure increases to 215C psi and eleetercaric rslid vals e opened 13 3.25 hours ac crain Tank pressure spike of 5 ps! 18 +3.8 hour DC Crain tack 7-ressure spike of 11 psi (unexplai.ned) - RC5 pressure only 1/50; Containecnt pre,ssure increases from 1 to 3 esi 379 273

b ' ) FIGURE TIME EV ENT 15 +5 hour Peak centair. ment oressure of k.5 psis containment would be automatically isolated et 4 psig. Ve believe the containment had been mano=11y 15clated prior to this time. 19 +5 3 to 6.1 hour acs pressure increased fr== 1250 psi to 2l00 psi 19 7.5 hear Dp e ra t or ener<5 e o: t r > sit i c r el i e f valve to dtoressurl:e RCS in at tempt initiatica of f.nA at LCO psi 19 -R-9 hour RC3 pressure decr:ases to 500 450 psi; CFT dischargo 15 -4.9 hour 25 psi containment pressare spike, sprays ini:Tated and sto e=d citer 5000 gal, nf NaC:i inj =ct:d (sboot '. minut s s o f ope ra: i cn'! 19 -13.5 Enur !! ec.t r aca t i c re i c f se l v e :t sed te repressurize RC2, :: i l a r s.:.cids and sisrt RC pe,p 19 +13.5-16 hour 205 oressure ;ncrea d frum 650 psi to 2300 osi ik -?6 hour F.C pune in L:c:s 3. started Pat feg 5 t erce ra te rg 54.reases := 5.60 F ano celd leg temperatare increases to 400 F i ndi ca t i r.g fi rs. .y.7 e. -,.,., : r,.,.. :.;,,... _...... ] C) ), it Date/Tiee Source Activity Wednesdav, March 28 M 4:00 None Incident sequence begins. (4So @ hod 5 b, g, Lic<u$ce decLs.t.24. Site eecm.y. '1: 02 SP Fo11cr.us w/PA Licensee notifies PEMA o'f siti e=ercency. 7:10 - 7:45 Regien I ~ Licensee attempts to contact Region I. Duty officer and Dep. Director officer enroute to office when beeper sounds. 4:;;g; :- 1'04 c" c, 3 c.r Licensee declares .:? general emergency. 7:45 Reg. I Upon opening switchboard, Region I receives message fres. licensee 7:50 Reg. I Region I contacts TMI control room; maintains open line. 7:55 Reg. I Region I classifies event as a Level 1 severity incident in ac::ordance with Region I incident response plan. Re I 'C: 3 oa T. M 4 r ':-6 Incident 8:00 Reg. I 2 Response Center acti'vaten,; John Davis, HQs., notified by Boyce Grier and also by Public Aff airs (Fouchard notified by Region I Public Affairs). E:05 Various John Davis orders Hqs 6perations ~ Benter activated. Region I State Liaison attents to contact PA Bureau of Rad. Health. 8:20 Reg. I Region I contacts independent measurement van (at Millstone site) and orders it dispatched to TMI site. I 0 LO e , jp y S 179 275

-g-pate/Tice Scurce Activity S:23

t'.....-

Phone call frcm Weiss and a e;- Moseley to Cc.L (CC7 Grier; John Davis calls bassick, Jepg::- who is not in. 8:30 Reg. I PA State Police inforced that NRC emergency vehicle would be en route. 8:25 Inco:::ing Tel. Log Gessick calls Davis 8:31 OC Tape Moseley notifies Stallo & EisenhutjStellosayshewill send radiological experts to CC 8:32 00 Tape John Davis calls L.V. Gossick 8:34 CC Tape John Davis calls Centon's of fice; speaks to Case. 3:35 00 Ta e Davis calls Hendrie's office; speaks to Bill Dorie. Several calls cade to reach Hendrie; finally contacted by at (clace) ( AM). 8:40 00 Tape Mike Wilbur calla Boyce Grier, obtains technical information. 8:45 Reg. I Five inspectors (including HPs) lyn) with radiation monitoring equipment leave for site. 1 t 8: 46 00 Tape Davis calls Dorie, asks for .d.1 Comm. Gilinsky in Chaircan's ((~ h absence; Gilinsky not in yet. L'8 g C* 8: 43 OC Tape Dudley Thomoson notifies Too Sf h Carter, NMSS. No HMSS actica required. 8:49 OC Tape Vard notifies J. Davidson, HMSS to make IAT notification. j 8:50 Reg. I Lag Licensae calls Reg. I with current status report. "Op. - N f r._.%, w. .. C m... J 2 r - '. b.. __4 276

10 Cate/Ti=e Scurce Activity 8:50 Reg. I State Liaison contacts PA Bureau of Rad Health A 4 Cc Tap <,, g' g2 - e,n G.. y -e o 8:56 0 Tape Gossick attempts to reach Gilinsky through Bill Dorie and through Gilinsky's office. Gossick talks to John Austen and suggests that Dorfe personally notify the Chartman. 8:57 CC Tape Davis notifies C ::nission Ahearne 8:59 00 Tape Bernie Weiss calls 00E Emergency Operations Canter t,0 wd. 9:00 00 Tape Bill h informs Randy Pine (CA). Randy Pine indicates that she will inform local Congressmen (Hein: & Schweiker) and Rep. _. 9:00 Reg. I Second vehicle leaves Regica for site (investigator plus inspector); Region I contacts RAP wno has alreacy been notified; two teams organized and standing by. 9:02 00 Tape Weiss notifies EPA (Floyd Galpin) 9:03 SP notes Joe Fouchard calls Carl Abraham, Reg I Public Affairs 9:10 GC Tape Gossick calls Congressional Affairs Office. Randy Pine informs Gossick that CA had received several inquiries from local Congressmen. 9:00 Beb Ryan Ryan notified by SR Region I personnel. Arrive [IRACT 9:35am 179 277

.n. Date/ Tim Source Activity 9:10 to 9:30 OCA - .7 CCA places call to majority and minority staffs of Houso of Subcommittee on Energy and Environ:nent, House Subcocnittee on Energy and Power and Senate Subec.mittee on Nuclear Regulation as well as Senators Hain: and Schweiker and Representatives Walker and Ertel to adivse of declaration of site emergency at Three Mile Island 9:05 CC Tape Bill Ward informs Cor.=unications Branch 3:10 OC Tape Grier calls Moseley to explain technical aspects of incident. 9:11 Incoming Log Gilinsky calls Gossick and Davis 9:16 CC Tape Fouchard notifies DOE Public Affairs Office (Scb Dulin).

1. FTER 9:15 AM Other NRC personnel began arriving at Incident Response Center (OC Tapes not yet scanned for tices after 9:16 am)

WniteHouseSituationRoomj.h-9:15 CC Notifications contacted 9:27 Inccming Log Defense Civil Preparedness Agency (DCPA) Calls Joe Hegner 10:05 Ph79-67 Reg. I response team arrives ~ at sita 10:05 Reg. I Reg I con

• acts EPA Has. (Also attempts to contact EPA:III) 10/05 M v EA y

10:05 - 10:10 Reg. I Discussion w/RAF re ARMS aircraft survey. ARMS people put on standby 179 27B

-~.., -u~ Date/ Time Sou*ce Activity 10:15 Reg. I - Onsite teaa infor:cs PA Rad. Health that they are available for questioning. 10:16 Incoming Log Conference call: All Cae:missioners and Davis 10:20 SP Log Telephone to PA State Rad Health Dept. (Gerusky not available). Call returned at 10:45 (1st liaison established by Hgs) subsequent calls every hour or two, starting abcut 5:25 pm to discuss status of sampling and monitorin3 10:30 to 11:30 OCA OCA calls principal oversight cor nittees (including a: pro-priations subcor=nittees) and Pennsylvania representatives frc:n vicinity of site to advise of release of radicactive WAM 'fe#}f *.N 5 $.r?*E w a< M 4 W 10:30 Reg. I Reg. I contacts Delaware 10:40 Reg. I Reg I contacts PA Governer's action center 10: 45 Reg. I Reg I contacts NY State Energy Office 10:30 PPJ79-64 First Pres:: Release based or freliminary Notif.icatien mm;.3~ 10:40 SP Leg Press Conference (from where?) patched through to PA Rad Health Dept. 10:55 SP Log Telephone call to PA Civil Defense (second call to Operations Officer at 11:30 am). 10:58 Incoming Log White House Duty Officer to Weiss 11:00 Reg I Second leam arrives at s ua and in control rtom }} h

Dr.te/ Time Source Activity 11:35 Reg I FPA Region III contacted 11:45 Reg I NJ Dept of Energy contacted 11:55 Reg I State of MD, Power Plant Siting council contacted PM 12:04 Reg. I EPA Region III contacted 12:10 teg I 00E (Valley Forge Office) contacted 12:20 CCA' OCA calls principal cversight committees and PA represen*a-tives regarding latest infor-mation (In response to request from Henry Myers for technical information, arranged for briefing by Mr. Stallo) 1:00 Reg I Third venicle departs for site 1:00 Reg I Reg I contacts MD Health Dept. 1:01 In===ing Leg Stelle calls Henry Myers r SP Lc[g SP calls VA Civil Defense.ae-1:12 V u ::. - 1:30 005 Logs 00E advance carty establishes cmmand post at, Capitol City Airport 2:15 00E Logs ARMS helicopter arrives at site and begins tracking. 2:30 00E Legs BNL RAP arrives Capitol City Airport; sampling begins 2:45 Reg I State liaiser contacts Governor's office Connec'. cut 3:00 So Leg Proposed NRC Press Release cleared with PA Rad Health Dept 3:45 PN 79-57

1. fe-Ee F /tsT P Ra > m w44 y i

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- 24 Date/ Tire Source Activity 4:00 OCA Telephone briefing for Senata Subcomittce on Nuclear ~ Regulation and Senator Heinz 5:00 ' PR 79-65 Second press release issued 5:15 Reg I NRC mobile lab arrives at site 6:00 Reg I Fourth Reg I vehicle leaves for site 7:55 SP Log Call to PA Rad Health Dept (ARMS data shows count is up. status of BNL monitoring activities). 6:15 SP Log PA Rad Health Dept acknowledges receipt of ARMS data and says they are keeping Governo-informed. 3:17 Reg. I Log Reg I nctified of decision to send NRR team to site; arrivai expected next AM. 3: 30 Reg I Fourth vehicle arrives on site 8:30 - Reg I 4:45 NRC, State, RAP Tea:s brief +-s Lt. Governor scranton 9:00 Region I Log Reg I notiffed that Salem providing equipment 9:00 SP Log SP verifies (how?) t.iat FAA has not been notified. 10:00 - 11:00 Reg. I Reg I participates in Lt. Governor's press conference t 11:30 @ ) -

30 (bM)

Reg I Team briefs Governor Thornburgh . N lYA

y (v TheAS A p afe!r @ \\ yv 9 2:15 PR #79-55 Press Release 1:00 SP Log SP notifies Defense Civil Preparedness Agency and reads press release. 2:00 SP Leg M talephones FA Emergency Management Agency, reads press reaease h2:10 SP Log SP tries to telephone Health Center for Disease Centrol (Atlanta) (PA radiological Health says they will try again in torning). 8:30 SP Log SP calls H. Calley, EPA, 'w 6 read press release and suggestec he call Gerusky and effer A assistance r~u;o.24d,:-H cu-ef Velddc5 9:00 Re; I g(6 people) dis;:atched to sita 9:30 S? Log Food and Drug Ac=inistration calls and offers to have Baltimore cield Office provide assistun.e in locking at food pathways 10:25 PN-79-57A -::.:: 556 M 11:00 SP Log SP tries to contact NY Bureau of Radiological Health (call completed at 12:17 pm) 11:05 SP Leg SP calls NJ Dept. of Health. 11:30 OCA Chairman Hendrie and HRC staff brief members of Subco=mittee on Energy and Environment, other Her.:bers of Congress, and Congressional staff on status of incident. 11:45 SP Log SP calls Delaware Rad-Health Dept. M 12:05 SP Log SP returns call to Gov. Ray's (Washington) assistant. \\19

- 16 _Date/Tice Source Activity 12:10 SP Lag SP calls W.VA Rad Health contact 12:15 .SP Log SP calls Va. Radiological ~ Health (call finally completed at 1:15). Approx. Noen unverified Strasma (Regfon III PA liaison) on site;-Vollmer +7 (NRR) arrive on site. 12:00 - 1:00 Reg I Vehicles 6 and 7 on site (total IE personnel; 17) l((f, 2:15 Reg I Congressional group (Hart, Udall, Heinz, et al) arrive observation center; receive briefiae. 2: 40 SP Log SP telephones Fish and Wildlife Service. ii-3:00 PH-67E A Licensee pulls thermolumi-nescent cosimeters from 17 fixed positions locatea within a 15 mile radius of site. Dosimeters had been in place for three months and had been exposed for about 22 hours af ter incident.,0nly two dosimeters showed exposures above normal levels. 3:01 S? Log SP briefs (by phone) Md. Radiological Health on status of samples. 3:20 Reg I Stata liaison contact with Vermont 3:15 - 6:30 Reg I cla NRC representatives 3 called to State Capital to brief Governor and Lt. Governor prior to Governor's 5:00 p.c. press Conference. L 3:35 SP Log Health SP briefi, g. gives status n 20

p. mewe b u$&y k~

x19 s; a. e_ o c 4 6

Date/ Time Source Activity 5:55 Reg I Log TheExecutiveManagementIeam directs the licensee to stop dumping all water. RI notifies HQ that stopping the du= ping will cause backing of water into the Turbine Building. (Late entry - the licensee, been dumping water to the river -- the water is within TS limits WRT contamination.) 6:00 Log??? PA Rad Health says !!RC can make decision on rad. water dump without checking further with them. 5:10 Reg I Log Licensee notifies NRC that he is stopping the discharge 5:30 Reg I Log Briefings provided by Met. Edison to Senator Schweikar, Congressmen Gooding (Ycrk), Mike McCormack; Waller (Lancaster), Weidler (L.I.,NY) 6:00 FN-67B NRC requests Met. Edison to terminate release of slightly contaminated industrial waste. Permission to resume release granted at 12:15 am and cordinated with State. State press release issued, 4: 50 - 7:00 Reg. I Hultiple attempts to reach EPA:I!! concerning industrial waste dumps; finally contacted at 7:00 p.m. 6:35 SP Log PA Rad Health calls back and asks NRC to hold river d:.m:p because of Governor's concern. SP provides update on AR5iS data. 7:05 SP Log Offer from DOE Emergenty ^ssistance contact (Joe Deal) f rom Harrisburg airport. 8:30 Reg I Call to Governor's Aide to inform of core damage 0

i. y O ' alu4 a4 0?te/~ ice Source Activity c:co - 8:30 SP Log Updated status reports to MD, 'l WA and US Bureau of Rad. (An b u n Q.E Q Healtn (Reg I Leg Periedic ARMS flights begin; continue at hour intervals CAtACA7A [$]ttree ($ttt/Lth. 10:05' SP Log PA Rad Health says "go'8 if NRC wants to have water on: ped. 10:12 Reg I Log Industrial Waste Discharge verified to be off. F-idav, March 30 AM H: 05 Reg I Log EMT asks IE/ site to relay to Met. Ed that NRC says OK to release incustrial waste. Notify NRC wnen release ccmmences. Reg I Log Incustrial Waste Tank over-2:05 flowing onto ground 5:35 Reg I Log rire in Unit One Aux. Building Basement - (picked up from intercom). Fire in ventilation system. 8:00 SP Log Status report to EPA. 8:20 SP Log Status report at FDA, Bureau of Radiological Health a:30 SP Log Status repo ' ) Md. Rad Health 8:50 SP Log CalI frcm FF questing status 9:00 Reg I Control room personnel (Unit

1) hear announcement tnat evacuation in a 10 mile radius around plant has been rec = mended by NRC.

Date/Tica Sourca Activity 9:05 P.eg. I Onsite inspector calls Region to Verify that above was true. Were told recomendatica was J not official. 9:25 Reg I Log State notified of release; ava a' tion rucored; site does not p.an to call for evacuation. 9:15 - 10:10 3P Log SP calls PA Civil Defense re potantial evacuation 9:50 FN 79-57S :Ti Issued 1C_00 Reg I Log Some confusion exists because State evidently has recommended evacuation of Middletown (Doc. Collins). Plant /NRC has not recommEded evecuation. A 10:25 Reg I Leg Co=munication Lost with Unit 2 Control room 10:30 - 10: 45 Reg I Log State has advised residents within.10 miles t:: go inside and shut windows. NRC positten remains: no evacuation / unnecessary to take any special precautions. 10: 47 Cesr. Tel. Log Conference call,between Gossick and Commissioners: decision to send Denton to site. 11:00 Reg. I Unit 1 Control Room becomes aware that an evacuation was suggested by Governor. 11:40 C=st. Tel. Log Hendrie and Governor discuss evacuation. 00$ 11:45 Reg I Leg Release at 11:09 for 415 secs. 12:03 Reg I Log Chairr,an of HRC recommends that Governor of PA evacuate 5 mi. radiu=. Date/ Time Scurce Activity 12:07 Reg I Log EPA, Region III advised of evacuation reco.T. endation. 12:30 Reg I Liig The NRC evacuation reco:nenda-tion is changed or is clarified as follows: pregnant women and preschool children in the 5 mi. radius should be evacuated. This recommendation to Gov. PA - not'public. Dr. Langford of EPA is notified of this change. 1:00 SP Leg Another conversation with FDAA re Governor's tece m endation for Presicent to call National Security Council meeting at 1:30. 1:15 - 1:30 SP Log Calls to MD, Delaware, NY, NJ VA, W.VA Rad Health regarding t Governor s rec 0=endation. 1:25 C sr. Tel. Log Hendrie conference at White House follcwed by 1:30 p.m. NSC meeting. 1:30 Reg I Anot' er vehicle (2 HPs) departs for site, 2:00

Mossburg, Deni s +12 arrive by.

Gossick Notes heli -pter at site; National Security Council called, President wants to talk to

Denton, 2:20 Mossburg3 NRR Operations Center Gossick Hotes established at nearby residence; notifications *a President Carter and Governor Thornburgh.

2:30 Reg I Director and Branch Chief plus 2 HPs dispatched by helicoptar. 4 00 Reg. I Helicopter arrives at site at W e kerr +5 cerive

30 Unverified gt te to assist IE Health Physict.

( (b NU .,N a <kk k Y So,P g Vi I 45 S s1 '

g3 By this tice, 83 NRC personnel are on site and in vicinity' (51 IE, 4 SP, 3 FA, 25 NRR). 6:30 PR No, 79-67 Press release "no inninant J danger of cora melt; tachnical experts (Denton et al) ca ggg pg; 3[ site" Date/Tice Source Activity ~ e:E nus, i Log (Maccen) acting as Administrative Officer reports the following: Trailer, manned by NRR (Denton) and the White House Coccunications Group is now behind the Observation Center and wired for use. Additional Trailer by 2145 will be wired with 6 telephones. Soyce Grier is downtown in Harrisburg at a Press Conference w/Stello, Centon, Governor Thornburgh. I i Air National Guard Unit at Harrisourg Int. Airport avail-able for assistance. i SP Log Coordinating meeting held at Capital City Airport (EPA, DOE, PA Dept. of Environmental Resources, FDA, NRC). 3:50 SP Log Telephone call'frem Bettis, Radiological Assistanco Team at Command Post at Capital City Airport; analytical equipment in airport hangar. 6:00 Reg I Log Oak Ridge can believes he can use the Loose Parts Monitoring to tell the size of the bubble in the vessel. 6:25 SP Log Call from PA Civil Defense; tatus update. M ^ 9: 00 Public Affairs Center activated at site; limited oparation until April 1. 8 \\,9 1-

Date/Tige Source Activity M 8 4 :30 SP Log Trailer coves just outside plant gate; NRR operations ~ center in full force. ~ 9:17 'SP Log Call from HEW asking what their role would be if evacua-tion necessary; NRC says PA Civi1 Defense has lead;. status update. 9:25 SP Log Call frem CEQ: status report 9:20 SP Log Call from NY Rad Health Bureau; status report. 10:00 SP Log Call from Defense Civil Preparedness Agency; status report. SM 12:00 SC Log Conversations with FOA-Bureau of 12:30 Radiological Health re supplies of potassium iodine. 2:00 SP Lag PA Rad. Health Dept agrees to refer all calls relating to health matters to NRC. 3:26 Casr. Tel. Log Commission meets in Bethesda at Operations C. enter. 4: 25 C sr. Tel. Log Hendrie and Governor confer via telephone on status. 5:00 SP Log NRC informed that Governor, W. Va. had activated State Radiological Assistance Tea =. 10:45 PN-67G NRC representative (Stello?) at facility informed that sabotage attempt would be made during the night. FBI, PA State Police and licensee notified. 179 2L89

~ Cate/ Tire Source Activity Sur. day Acril 1 1:30 SP Log SP calls DOE Cc= mand Center ~ (they do not know where EPA people are); also calls PA Rad. Health; EPA lab is next door but no one is there. 8:13 SP Log SP calls PA Rad Health (D05 will collect all data and transmit results to NRC). Meeting scheduled at 8:30 to set up coordination. 9:35 SP Log C. ntact established by tubenau/Vaden at PA Rad. Health offices. 11:00 Reg I Log NRC Personnel on site (65 I&E; 27 NRR; 5 others). PN-67H NRC establishes 37 TLD stations at distances from 1 to 12 miles frcc plant. PN-67H All utilities with an cperating B&W reactor are sent an NRC Bulletin to: (1) provide information on TMI-2 incident (2) require a pec=pt review of their plant conditions, (3) take action to prevent such an incicent. NRC inspectors are being sent to dach licensed S&W reactor to provide increased inspection coverage. 2.15 - 2: 17 Reg I Log President Carter is on site in Unit 2 Control Room. 8:40 Gossick N.otes NRC calls 00E/EOC to request cleanup of AUX Building... General Public Utilities requested help. Monday Acril 2 $U 3:35 Reg I Log Hqrequests licensee to send sample of containment air (2330 sample) to Bettis. 17.9 290

.s.. Date/Ti t Source Activity E*9 I LO9 Phone ! ink drops out/HQ will try to re-establish conference call. -Reg I Log Phone link re-established m cnight Gossick notes Danten briefs Governor of PA. 179 29I

'4f; .----..,-~.m.. ,M.~i.j-)y. ! w4ssiNoTon, c. c. :osss 2 Q n, i ps, J/ f f '{7Q @,/ April 5,1979 56

• ,,s F.EMORANCUM FOR:

3. H. Grier, Director, Region I J. P. O'Reilly, Director, Regica II J. G. Keppler, Director, Region III K. V. Seyfrit, Director, Region IV T

R. H. Engelken, Director, Region V FROM: Nonnan C. Moseley, Director, Division of Reactor Operations Inspection, OIE /'.f_j SU30ECT: IE BULLETIN 79-05A, NUCLEAR INCIDENT AT THREE MILE ISLAND -ne suoje:: IE Bulletin should be dispatched for action by April 5, 1979, :o all B&W pcwer reactor facilities with an cpera-ing license. Ne Bulle:in.ust be faxed to Ba'.; f acilities by April 5. 3;;fec: bulle:in and enclosures should also be dispatched for informa-ti:r :: ali c:ner pcwer reac cr facilities with an c:erating license ll ::..er reactor f acilities with a construction ::ermit. c: -.o a -ne text of the Bulle in, Enclosures there:c and craf t letter: to the '.icenses are enciesed for :nis pure:se. The con:inuing Creliminary

• !::i#iCa!i0ns Of the irCident should C: ntinue 13 he #C' warded as they are ',eceived in aCOOrcance with the transmittal ~'eIOrandum for

:. ' c. w a,*. / c, _ r ::h.

..'t 4 i 6 / ll -:$&. lNormanzr.s:seiev,cirector n as Division of Reactor ODerations Ins pecti on Office of Inspection and Enforcement Encicsu-es'. 1. Draf: Transmittal Letter to all E&W Opera-ing Licer sees 2. Draf t Transmittal Letter to all other Operating Licensees and Ccnstruction Permit Hciders. 3. IE Bulletin No. 79-05A 17o 9o C / 2-I// (w/ enclosures - 2) y CONTACT: D. C. Kirkpatrick, IE DUPLICATE DOCUMENT l 49-28180 l Entire document previously entered into system under: f ANO l104 M 00 M No. Of pages: 3 l ) n J E '" DMI M 844:4 @ jrffA9{ v e sr..w., . iy.N

UNITED STATES a m NUCLEAR REGULATORY COMMISSION a-0FFICE OF INSPECTION AND ENFORCEMENT 'ifn WASHINGTON, DC 20555 9 it APRIL 5, 1979 7 hi IE Bulletin 79-05A 'if -e 5: "UCLEAR INCIDENT AT THREE MILE ISLAND - SUPPLEMENT Description of Circumstances: Preliminary information received by the NRC since issuance of IE / Sulletin 79-05 on April 1,1979 has identified six potential human, a. design and mechanical failures which resulted in the core damage and dy radiation releases at the Three Mile Island Unit 2 nuclear plant. The d information and actions in this supplement clarify and extend the original Bulletin and transmit a preliminary chronclogy of the TMI accident thr ugh the first 15 hours (Enclosure 1). 1. At the time of the initiating event, 1:ss of feecwater, both of the auxiliary feedwater trains were valved out of service. 2. The pressurizer electromatic relief valve, wnich crened curing the initial pressure surge, failed to close shen the cressure decreased beicw the ac:uaticn level. roll: wing racid de:ressuri:2:i:r of the cressurizer, the cressurizer 2. level indication may have leac : er-onecus inferences of high level in the reac; r cooiant.jstem. The :ressurizer level li.dication rparently led the operators :: premnurely ter"nate hign pressure injectica f1:w, even though substantial voics existed in the reactor 00 1an: system. 4 Because the c;ntainment does not isolate on nigh pressure injection (HPI) initiation, the highly radioactive water from the relief valve discharge was pum ed cut of the containment by the automatic initiation of a transfer pun. This water entered the radic>.ctive waste treatment system in the auxiliary buildin; where scme of it overficwed to the ficor. Outgassing from this water and discharge through the 2.uxiliary building ventilation system and fiiters was the principal source of the offsite release of radioactive noble gases. 5. Subsequently, the high pressure injection system was intermi"enti ~ operated attempting to centr 01 primary coolant inventory losses I througn the electromatic relief valve, apparently based on ~ pressuruer level, indication. Due to the prmence cf steam and/or noncondensible volds elsewhere in the reactor coolant system, l/g 2ni /3 enis led wo a Turther reduct on in primary coolant inventory. i a DUPLICATE DOCUMENT Entire document previously entered i g into system under: j hb Cb ANO No. of pages: Q\\, >}}