ML19340C631
| ML19340C631 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/20/1979 |
| From: | Sicilia P NRC - NRC THREE MILE ISLAND TASK FORCE |
| To: | Bernero R NRC - NRC THREE MILE ISLAND TASK FORCE |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8012110698 | |
| Download: ML19340C631 (23) | |
Text
-
e 8[
Io,,
+
UNITED STATES NUCLEAR REGULATORY COMMISSION o
h.
WASHINGTON, D. C. 20555
%*****/
August 20, 1979 MEMORANDUM FOR:
Robert M. Bernero FROM:
Peter Sicilia, Jr.
SUBJECT:
REVIEW 0F REGION I INCIDENT MESSAGE FORMS (R0-I, IMF)
I have reviewed the R0-I IMF's in detail for the first four days, March 28, 1979, to 11:50 PM March 31, 1979. The results of this effort are divided into three parts.
Part I - Four Day Chronology of Highlights Attached as Exhibit 1 is a chronology that reflects significant data elements documented by R0-I.
It highlights those events that are recorded and refer to the RCS status; plant parameters; significant leaks, releases, and expressed systems problems.
The chronology covers the period March 28 thru the 31st inclusive.
It should be considered a working document only and not complete in itself.
In many cases it reflects only significant parts of an entry as defined above.
Part II - Generic Summaries:
First 3 Days Based on the data available in the IMF from R0-I, I intend to prepare summary chronologies of the following areas:
1.
Evacuation 2.
High Pressure Injection System 3.
Names of People Involved or Mentioned 4.
Releases and Leaks 5.
Bubbles and Vacuums 6.
BWST 7.
Comunications 8.
Containment 9.
Depressurization/ Blow-Down/RHR-DHR System 10.
Fuel 11.
Pumps
- 12. Steaming and Condensors In all cases the summaries are written and will be typed this week. They will include all references made in the R0-I IMF during the first three days of the incident. These sumaries will be prepared and submitted by August 29, 1979.
'80222yo[fd9
. =..
=..--..
R. M. Bernero August 20, 1979 i
Part III - Schedule of RCS - 1st Day
)
Attached as Exhibit 2 is a schedule of factual data as reported and documented in the R0-I IMF.
It reflects the RCS status and plant parameters throughout the first day, 3/28/79. This workpaper reflects the data received by R0-I and available to the NRC for analysis on that day. The individual reader can draw l
his own conclusions from this data.
.m e
)
7
,$!da,.I1/D Peter Sicilia,(Jr./
Attachrents:
Exhibit 1 - Chronology Exhibit 2 - Schedule of Factual Data e
5 f
l i
I I
-. _ _. _ ~
,_.,-.,v,,..
7 g
-w"*'-C'*
r'*"*
-"*v----
9*v--""'e-
- ""'""'"-"-f ww'- - ' " ' '* ' * - *a-
w*
- ~ ' - - ' ~
v'w-
INCIDENT / MESSAGE FORM R0-I No./Date/ Time Info. i -arted by 3/28/79 C-2 8:50A Dubiel Primary to secondary leak in B generator.
C-2 8:59A Kunder Press primary 1400 psi Temp. can't tell - not getting proper flow to core not being cooled is a concern. There's vapor lock in loops.
Hi pressure injection - 250 gpm/ leg C-3 9:09A Warren Instrument air was flooded out - dryers full of are blown down once/ shift water C-3 9:10A Warren What is containment pressure?
- coming down, now 4 psig Steam Generator level? 44% A 66% B Any water going into Steam Generator? isolated Containment spray?
not operated or actuated Any safety valves open? steamlines(?)are closed - appears (not legible)
C-4 9:53A Kunder What is Primary System? Press 2000 psig Temp 5710 TKs not right Bridge monitors pegged outside by access hatch 100 mr operating floor by incore 10R/hr.
C-5 10:15A Kunder Still injecting Have primary to secondary leak in Steam Generator 45% Lv. Using A Gen for co911ng.
0 C-5 10:45A Dave Smith Quest? Update of RCS temp. 220 Press 1950 C-5 10:55A Higgins Trying to cool down using A S/G using dumps.
C-6 10:55A Higgins Possible bubble in both RC pump legs BWST 142,000 gal 37' left in TK Cont press 2 psig decreasing Pressure > 400"
. 1 No./Date/ Time Info. Reported by C-6 11:00A Hitz Still feeding A Gen & using dumps.
C-9 N11:30A Nimitz Primary to secondary leaks releasing to Atm.
C-9 11:40A Superintendent Tk's have releases under control.
C-10 11:45A Gallina Containment pressuce?
HPCl Status?
C-10 11:56A Gallina 1.5 psig Rx cont. press.
Unit 1 is in hot stdby C-11 12:20P Baunack Pressurizer is full, they have bubble in S/G.
(forSeelinger)
Primary 2000 psig Concern with potential for another release if reliefs blow.
C-11 12:43P Gallina Getting ready to flood 32' BWST Rx cont = 3 psi increasing C-12 12:45P Ray Smith Baunack Quest.
How are you going to cut in RHR7
?
C-13 1:35P Gallina What is status of Pressurizer Relief Valves?
Closed.
C-14 1:45P Gallina RC pressure 500 (temp 250?)
RHR will be initiated 0 m 350 psig Rx cont 1.2 psi C-16 2:30P Gallina All U-2 drain tks are full, will dump neutralizing waste tk (U-2) to misc of U-1, will bleed tk on floor; will pump aux. b1dg. floor to U-2 neutralizer I
tk and misc (U-1) waste tk.
C-16 2:45P Sandy. Lower No water now coming fm containment. Tk none L,,
since 4 psig isolation.
d k
~,
. No./Date/ Time Information Reported by i
q C-17 2:55P Gallina ?
Status: U-2 Nat circ cool down 550 Th 30/hr est.16-18 hrs to go 200 Tc to RHR 450 Psig Going on decay via BWST Suction fr BWST thru RHR pumps & recirc open TH c 1 2 & 3 C-18 3:00P Lost site communications C-18 3:30P Hitz Re-established comm. with site.
Cooling down 3 /hr currently 450 psig interlock 420 psig Lv Pres.
Flow Not cooling down using steam generator Now makeup pumps to 16 valve to Rx Pressurizer level S166" periodically cycling electromatic relief C-19 3:45P Higgins Pressurizer level 170" temp.
4600 press. 450 psig C-20 4:10P
?
In-core temps - unavailable (compster or instr problem)
Core flood tanks floating on core; slide in 0600# Th 590; other pegged + level
. decreased pres 175" (solid)
U-2 feels no boiling in core C-20 4:30P
?
Opening EM RV to depressurize C-20 4:45P
?
Pressure 450-500 Continuing normal letdown + EM-RV opening 120 gpm intermittently C-21 4:45P
?
With EM RV opening, lowest press.450#
C-21 4:50P
?
Bleed thru ld 0120 gpm - nat circ cool-down thru "A" SG
. No./Date/ Time Info. Reported by C-21 5:05P
?
Starting to draw vacuum Confident no bubble in "A" SG loop Press,656# - continuing L.D.
Prz 400# coming down 4
C-22 5:20P Higgins Starting to Steam A Gen to Condensor 1
Pressurizer 400" Pressure 650 psig B loop 650 -7000 m
l C loop 2250 I
TKs not dependable Hot leg 570 -5800 Still feeding with makeup pumps letting down with electromatic relief.
C-23 5:48P Higgins A Stm Gen valve not opening - not steaming.
Bleed valve fr gen to condensor.
Are investigating why valve not opening.
C-23 5:50P Higgins A Stm Gen - started steaming - using turbine bypass valve to condensor - indication of level drop /
temp. change in SG.
C-24 6:00P Higgins Continuing cooldown A loop 548 TH Filling pressurizer - going solid to collapse all bubbles
@ 900 psi - going to 2000 psi BWST - 23 feet C-24 6:15P Higgins RCS pressure - 1100 psi TH 555 Tc 300 A loop B loop still has a bubble 650-700 TH 0
200 F Tc j
Condensor vacuum : 27 in Hg l
_ _ _ _ _ _ _ _ _ _ _ _. No./Date/ Time Info. Reported by C-25 6:35P Higgins RCS pressure 0 1806 TH 570 Tc 220 C-25 6:52P Higgins RCS pressure 0 2300 psi l
Bubble still in B loop 0
A loop 560 F TH 320 F Tc 100,000#/hr condensate flow in B S/G A S/G = 50 psi C-26 7:00P Baunack Pressurizer pressure 2300 level (solid) i Th 5600 0
Tc 3600 B 220 C-26 7:10P Baunack-Th 557 0 Tc 380 B 2400 Stm Gen B 180 psig A
20 psig C-27 7:20P Baunack BWST 0 22' (2' < 0 6:00P C-24)
Steaming A loop AT decreased Rx pressure 2300 Increasing temp with heaters
- 0.2 psig C-27 7:35P Smith Bumped Rx coolant pump e s up to bs 0
b p C-28 7:45P Smith Plans are to restart RCP and leave on. RCP started in A loop.
C-28 7:48P Smith Presg press 1200 psi steady Both A&B SG 350 presg 100 psig Pszr level - high 0
0 C-28 ~ 8:10P Baunack~
Tc S320 -340 0
Fuel temp.611 to 254 Maintaining U-2 vac off U-l aux boiler.
Flows look good.
-- No./Date/ Time Info. Provided by 0
C-28 8:16P Baunac!<
S/G 100 psig Both Tc's 340 Przr Press 1300 psig 0
temp. 519 Vac - going down C-29 8:20P Baunack Aux. boiler back and vac ok
,i Accumulators valves are open breakers racked out t
C-29 8:40P Baunack Tc 320 1180 przr p 520 prz T i
j prz still pegged high - steady indication Aux. boiler 45# & going up - no condensor vacuum problems I
C-30 9:00P Baunack ?
All plant monitors are off scale.
C-30 9:15P Baunack Tc 310 PzP = 1050 psig 30" Hg vacuum PzT = 520, No Th Tare below scale 0
C-30 9:32P Frrr 1025 psig Tc 310 F Tp 5300F d
l C-31 9:50P Przr 1000 psig Tc 3050F pegged 0
Przr temp. 535 F L przr - t C-31 10:00P
"?
Przr 957 psig Tc 302 F l
Przr temp.537 F Stm Gen Pres.50 psi l
8 /hr cooldown rate 0
(
C-31 10:04P
"?
Visible level reported in przr.
1 i
C-31 10:20P Przr 955 psig Tc 300 F 0
l Przr temp 539 F C-31 10:37P Tried spraying przr; level caa,e up so they stopped and are continuing cooldown.
l C-32 is missing or was skipped = 23 min,10:37-11:00 h
,~-
No./Date/ Time Info. Reported by C-33 11:00P Baunack ?
RCS cooldown stopped / lost letdown flow.
R. Smith understands all waste tanks on site are full, complicating water handling problem.
C-33 ll:27P
"?
Przr 978 psig Tc 296 Przr temp.546 F Przr levels 85% / heaters secured C-33 11:50P
"?
Przr level decreasing; slight cooldown continuing suspect letdown valve leak; pressurizer heaters may be on - were on 0 11:40P S/G level in normal range trying to minimize release.
3/29/79 Watch relief - G. Karman, Recorder, W. Lazarus, E. McCabe, J. Allan C-34 12:02A
?
Przr 1010#
0 Przr temp.550 Tc 292 Przr level 80-85%
92% via S/G C-34 12:07A
?
SG400"(level)
(in response to HQ suggestion to go solid in S/G to enhance cooldown)
C-34 12:29A Baunack Przr - 1066# Tc 291 0
Przr temp.- 559 Trying to open letdown leg pass I
l C-34 12:45A Baunack Still no letdown, could not get to bypass.
l WB:Do not know why normal letdown was lost -
j possible failure of air op valve.
C-35 12:54A
.Baunack ?
Przr 1103# Tc 2300 Przr temp.553 Level 93% going up heaters off C-35 1:10A
"?
Przr 1089 Tc 289 Przr temp.553 C-35 1:25A
"?
Przr 1076 Tc 288 Przr temp.552 C-35 1:40A Raymond Relieves W. Baunack in TMI 2 C R.
C-36 2:04A Przr 1080# Tc 288.6 Level 400# 551.50 1 A pump on C-36 2:25A 1055# Loop A in 287.8 Level 395"+
l i
550.6 Loop B 287.4 SK A SK B 37#
41#
Letdown via sample line to Mu tank 4-5 gpm Also letdown relief valve to holdup tank (flownotgiven).
- __ No./Date/ Time Info. Reported by C-37 3:00A Raymond Przr 1036# 549 level 385" going down Loop A 287 36#
Loop B 2870 40#
C-37 3:00A Thermocouple reading off computer 567.2 (location unknown) 21' left in boron storage tank 2270 ppm borated water Heaters operable but not on C-38 3:55A 0325 Reaoings Przr 1016# 5470 level 3754 A S/G 35# S40" level (still steaming) 2870 B S/G 40# C40" level 2870 Incore thermocouple 581 0
Other thermocouple from 207 to 617 C-39 4:50A 0425 Readings:
990#
5450 level 353" 0
0 A S/G 286, 35#, downcomer 270, 290 steam out 0
B S/G 286, 40#, downcomer 280, 335 steam log 100 F W A Let down going to 3 bleed hold tks max levels 04:25 12.5', 11.5', 6.4' C-39 5:07A Pressure Spray seems to cause level to increase l
Holding spray until 300# is reached in przr C-40 5:45A Przr P 957#
S/G A 33" U
Tc 285 F S/G B 38" Przr level 3500 Przr temp 542 0
U C-40 6:06A Thermocouple data 207 thru 617 0
C-41 6:45A Przr 898# 362" 535 Spray attempted level increased 343"-360" i
50# decreased 0
Loop A Tin 284 32#
Loop B Tin 2840 37#
l Int cool water temp was increased, some letdown flow connenced.
L
. No./Date/ Time Info. Reported by C-42 7:25A Raymond Przr 892# 533 357" +
Loop A 283 Tin, B 283 Tin C-44 9:40A Verified all rods are "in" except part length rod:
" fixed" position by design C-45 10:00A Steam Gen. AT A - 20 F B - 150F 0
C-45 ll:05A No definite estimate as to amount of primary coolant in aux b1dg.
C-46 12:05P Licensee to trend high thermocouple (core) 0 readings (several thermocouples readingE500 F) with systems pressure. Also intend to megger high reading TC's to determine operability.
C-47 2:05P HQ HQ requests that if T/C's are meggered by licensee, concentrate on 100, 7E, 9G, llK, 9M, which are reading the highest.
How did HQ know this?
C-47 2:20P Raymond i Licensee feels bubble may still exist in reactor vessel. Reason: turned on przr heaters,
. pressure increased but level decreased.
C-47 2:50P Przr heaters on to raise pressure in attempt to verify bubble in reactorvessel.
C-48 3:05P W/ heaters on, pressurizer pressure t 906 psig, level dropped significantly. Bubble probably exists. Plan to maintain pressure at present levels w/przr heaters to collapse bubble.
C-48 4:50P Watch relieved by Caphton, Rekito, Stettler, and Brunner.
C-48 5:40P l' alt requested the licensee to review their suspected leakage rate from the RHR since R/C coolant levels are so high.
C-51 7:58P
?
Licensee does not plan to test DHRS. The system was previously tested (hydro) and had leakage of < 6 gpm.
C-51 8:50P McCabe E.C.McCabe in U-2 C R Rad detector on letdown line was pegged high 6
(10 cps) - letdown flow is 20 gpm.
..m
. No./Date/ Time Info. Reported by C-52 10:54P Whitt Plant will continue its present status for next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to 3 days while evaluating RHR system leakage, etc.
C-52 11:07P
"?
100 - 150 MR/hr in base of aux. bldg.
C-52 11:09P
"?
Rec'd 1100 parameters.
3/30/79 Lazarus C-52 12:05A Whitt ?
EMT tells IE/ site to relay to Met Ed: NRC says OK to release industrial waste. Notify NRC when release commences.
C-53 1:52A
"?
Venting makeup tank to waste gas tank A vent header.
Have not A'd containment status, fan coolers are i operating.
C-53 2:06A
"?
Industrial waste tanks overflowing onto ground.
C-53 2:05-15A
"?
Venting MV tanks to WGDT - Saw some leakage out of aux and fuel bldg.
C-54 3:12A
"?
1300-1500'3 bubble in Rx vessel has been measured.
C-54 3:34A
"?
Results above are based on plant parameters 14 hrs ago and not on suggested NRC test.
C-54 5:35A Intercom Fire in U-l aux. b1dg. basement (picked up from intercom).
Fire in ventilation system.
C-54 5:41A P A system Secure from fire unit: overheard over PA U-1.
C-54 5:55A
?
Concern per sources of H2 - to contact B&W -
2 sources - decomposition + metal - water reaction l
C-55 6:33A
?
Licensee still pumping I WT.
l C-55 7:40A Raymond 1 Status: Draining BWST to bleed holdup tank via (?)
makeup (andpurificationlines. One holdup tank is l
0 15' 15h' is full).
C-56 8:20A Baunack Licensee has secured flow to idle reactor coolant pump seals with concurrence from B&W (seal water injection secured) to idle pumps.
l l
. No./Date/ Time Info. Reported by C-56 8:30A Baunack Letdown from BWST to bleed tank is not intentional; apparently, a mis-valve lineup while trying to
, establish a letdown path.
C-56 8:45A Higgins iSeal return to makeup tank is causing excessive Ioff cas in makeup tank which in turn is directed j to waste gas tanks which are full.
Waste tanks being dumped to stack which is causing a~more ~ 3i considerable release rate.~~C/D and State are being notified by licensee.
C-56 9:00A McCabe High pressure spike in containment vessel to 28 psi 9 3/4 hrs into the incident (1400 3/29/79).
Suspect hydrogen detonation. B&W evaluating con-cern - hydrogen in all water storage tanks.
C-57 9:15A Higgins Waste gas release problem. Waste gas flow path:
makeup tank, vent header, compressor, waste decay tanks 1 decay tank full, other one 1/2 full.
Rate of gas flow to vent header pressurized it, overloaded compressors, lifted relief - gases vented directly out stack.
C-57 9:25A Evacuation - some confusion - evidently State has recommended evacuation of Middletown (Doc Collins).
Plant /NRC has not recommended evacua-tion.
C-58 10:03A Excess gas releases stopped.
C-58 10:03A State notified of release - evac rumored, site does not plan to call for an evacuation.
C-58 10:03A Cause of earlier release - makeup tank relief lifted - pressurized vent header.
C-58 10:13A Unit #1 turbine bldg and C R on respirators due l
to high airborne activity.
No numbers / levels available.
l C-58 10:19A-Time span of this morning's release, best estimate l
0710-0900. 9:00 1st log entry / pressure spike.
NRC log indicates gas release prob not till 9:15A.
. No./Date/ Time Info. Provided by C-59 10:25A Higgins ?
Lost communications with U-2 C. R.
Relayed from HQ 10:30-45A State advised residents within 10 miles to go inside/ shut windows.
+
NRC position remains - no evacuation / unnecessary to take any special precautions.
C-60 11:25 Info relayed from HQ 1109 Vent header relief valve lifted to stack (another release).
Przr level = 70% letdown is presently through letdown relief.
Temp hose from containment from makeup tank should be made up by noon time today - permanent 1 day presently have a 1 mr/hr heat up rate.
If plant goes solid (pzr full) plans are to vent pzr using electromatic relief.
Relay of above information very rough incomplete. Plant status appears to be approx. same as prior to loss of communication.
Release 0 11:09 for 9r15 secs. Planning another release at this time.
Aux. b1dg. sumps filling - water source?
L 12:03 Chairman of NRC recomended to Governor of Pa to evacuate 5-mile radius.
12:07 EPA Region III advised of evac recomend.
(Langford).
C-60 Relayed from HQ 12:07A Line from makeup tank back to containment hooked up.
12:15A Rpt fm HQ - waste gas decay tks are expected i
l to fill completely this afternoon.
C-61 12:30P NRC evacuation recommendation has been changed or is clarified as follows:
pregnant women & pre-school children w/in 5-mile radius should be evacuated. This recommendation to Gov. of Pa. - not public.
Dr. Langford of EPA was notified of this change.
Still no commun.
to U-2 C R
- No./Date/ Time Info. Reported by H P line 11:30A last entry:
From F. Costello Coste11 Rad levels in areas around site are as follows:
1 mile south of Goldsborough on Rte 262 2.5 MR/hr (other levels reported - not printed here - lower than 2.5 MR/hr).
C-62 1:35P H P line
!The site does not plan on making any other Stohr i releases to atmosphere. Gases vented back to
' containment through temporary hose - although the hose flow path has not been tested.
C-62 2:20P
?
Przr 1009# 5510 level 213 0
cooldown
.6 F/hr 0
Tc A 279 32#
0 Tc B 278 26#
3 Estimate 1100 ft bubble in reactor.
C-63 2:50P Baunack Vent from letdown MUTK to CV opened, rad levels at site boundary increased from 2 Mr to 30-100 Mr.
C-63 5:40P Contact Re-established conference call w/HQ & site.
made C-63 5:00P
?
Tom Stetka & Walt Rekito relieved 0800 to 1700 watch.
C-63 5:45P E. McCabe Identifies ops. branch watch schedule 0 site.
C-64 5:45P Effluent control 0 Process Cntr.
0800-1600 Beckman 1600-2400 Haverkamp 0000-0800 Raymond U-2 C R watch 0800-1600 Baunack 1600-2400 Johnson 0000-0800 Higgins C-61 5:50P Rec'd 5:00P parameter & thermocouple data from HQ via fax.
C-64 6:15P Haverkamp Reported "one exposure of 1600 Mr to instr foreman" this date.
Info requested by HQ.
.. -. m No./Date/ Time Info. Reported by C-65 6:10P Johnson Site reported temp line installed from waste gas decay tk "B" to cont but not yet put in service. Also VCT pressure 0 26 psi.
Info.
request by Brunner.
1:35 Rprt gases back through temp hose.
C-65 6:30P Received systems parameters & thermocouple temp taken 0 4:25P. 2 hrs delay - why who's on shift - Johnson C-65 5:151 ate Pressure in VCT is 26 psig.
entry Why Johr, son?
C-65 7:30P Haverkamp Provides status of RC bleed holdup tanks tk 1A - full 33,000 gal, tk 1B & 1C 90%
full 75000 gal Above info. requested by HQ.
C-66 8:15P Johnson Site reports overall status of plant including containment pressure = 1 psi.
In addition, he explained operating staff's concern for operable RC pumps. Currently (RC-P-2A) inoperable because oil lift pump keeps tripping.
RC-F-1 B is available with oil lift pump running and other pump in loop B (RC-P-2B) inoperable due to l
problem with oil lift pump. Currently trying to resolve these problems.
C-66 8:50P Johnson Site reports systems parameters & thermocouple temperatures.
C-67 8:45P Madden Acting as Admin Officer - NRR trailer, manned by Denton & White House coninunications group, is now behind Observation Center and wired for use.
By 2145 another trailer will be at the Observa-tion Center, will be wired w/6 telephone lines by midnight for IE use.
Boyce Grier is downtown in Harrisburg at Press Conference with Stello, Gov. Thornburgh, & Denton.
C-68 9:20P
"?
Condensor vacuum = 28" C-68 9:35 P Commenced venting przr & are holding pressure &
level stable.
C-68 9:45P Continuing to vent przr (0 6 gpm) level remains constant 0 216; pressure 1028 psig.
._ No./Date/ Time Info. Reported by C-68 10:15P Madden Terminatedprgrventing;w/przrpressure1026 przr temp 554 F, przr level 215 ft.
C-68 10:30P Containment radiation levels reported. Dome monitor meter reading 100 R/hr, but meter shielded by 4" of lead so actual level is 104 R/hr (info requested by NRR)
C-69 10:45P Commenced venting przr again.
C-69 10:50P Site reported systems parameters and incore thermocouple temperatures.
3/31/79 C-69 12:01A Bettenhaus/ Lazarus /Fasano on duty.
C-69 12:35A Venting prsr; prsr level 215, "025 psig 554 F.
0 C-69 1:30A
?
80 psig in waste gas tanks; 60R on contact.
C-69 2:27A
?
Shielding around H2 recombiners will be completed in 1/2 hr.
have_not_. vented decay tanks into_the containment._
C-70 2:40A
?
23K gal borated water delivered from Salem.
Rigging up temperature line from U-l SFP to U-2 SFP to the EWST.
3 3
C-70 3:20A
?
20K ft H2incontajnment,evolvingat300ft/hr
+prsr vent of 90 ft /hr 80 K ft3 +4% of 4% uncertainty applied they could be at 40%.
C-70 3:30A 7
All 3 RCP's have operable lift pumps.
C-70 5:30A
?
Attempting an H2 sample on containment.
C-71 7:30A
?
Status: - RCPlA operating
- RCP2A in standby status w/sealflow presently to head pump off but operable
- 4 fan coolers operating
-1 in standby present power supplies W as follows:
- site on normal
- offsite XMFRS 2A + 28
- instrument '?
and 4 inverters operable
- emergency diesel generators have been verified to be operable.
. No./Date/ Time Info. Reported by Containment status:
pressure - 1 psi air sample - H2 1.7% @ 7:00A Ca 16.5%
Ne 31.8%
Sump level + 2 (above the floor) bleed and hol.d up tank pressure 22#
n n
levels 15.2' 13.6' 13.7' MSIV's - all shut bypassing around 1A Prsr Press 1023 psi Temp 554 F Level 216" 0
Both Tc's - 280 F S/G (A) 31 psig S/G (B) 27 psig Cooldown rate
.2 F/hr "0" letdown flow.
Estimated reactor bubble volume now approx.
875 cu.ft. normalized to 965 psig.
What happened between 7:30 A and noon?
C-72 12:00N Lost contact w/U-2 C-72 1:15P Re-est'd contact w/U-2.
C-73 1:45P Temp:erature distribution data inside containment are as follows:
Data Pt.
Elevation (ft)
Temp.(F) 11 353 93 12 353 93 13 330 96 14 330 93 15 310 89 16 310 76
. No./Date/ Time Info. Reported by C-73 2:00P S/G "B" analysis results are as follows:
I-131 2.4 x 10 2 25%
I-133 9 x 10 2 25%
i Ce-134 1 x 10-2 43%
Ce-136 2.7 x 10-2 28%
Ce-137 4.2 x 10 2 26%
Kr-85 or 35 7.2 x 10-2 28%
Mo" 2.2 x 10-2 29%
C-74 2:55P
?
Some thermocouples read locally. Temperatures differed from cou.puter printout by small amount.
C-74 3:22P Moveable incore neutron detector. B&W has written procedure to move in and out of core to measure beta and gamma radiation levels e/in,
core. Local rep says probe will not measure
<l5% reactor power.
C-74 1:20P Late entry lWastegastankpressures080psig C-74 5:25P
?
Lost comunications w/U-2 C R.
C-74 6:30P
?
Regained comun. w/U 2 C R & Rg.
Informed of loss of pressure in MVT & vent head went from 12 psig to S.
MVT was isolated from vent header & pressure is again increasing.
At time of MVT pressure drop, waste gas decay Tk A & B pressure increased from 82 psig to 84 psig (it was reported).
3 C-75 5:35P Bubble size in Rx now at 742 ft,
C-75 7:00P Site reported 6:35 PM system parameters & incore
[
thermocouple temperature.
MVT pres 11 psig & rising.
C-75 7:40P Rec'd 5:30P readings (incore temp & sys parameters) via rapifax from HQ.
L
O
.' No./Date/ Time Info. Reported by C-75 7:45P Site reported sys. parameters and incore thermo-couple temperature readings taken 0 7:30P.
C-75 8:15P Arms reported following 5:45P "possible release" indicates no additional abnormal indication levels varied from 1-3 Mr @ 1000 to 3000 ft above stack.
C-76 8:55P
?
Site started to report sys. parameters & incore temps.
(readings taken 0 8:35 p)
C-76 9:45P
?
Site reports data taken 0 9:30P Poor communications - did not copy; will request HQ to fax info.
C-76 10:30P Rec'd 9:30P data from HQ by fax.
(~
EXHIBIT 2 ONLY THE ORIGINAL OF THE MEM0 CONTAINS THIS EXHIBIT.
- DOCU V l
M i
F"
- A=
../L l
A\\ O. mma
/
NO. OF PAGES REASON O PAGE ILLEGIBLE.
O HARD COPY FILED AT.
/
/
O BETTER COW REQUESTED ON PAGE TOO LARGE TO FILM.
p -Den e,a n nR g OTHER M
FILMED ON APERTURE CARD NO.
DOCU V.E \\;-
3 AGE PJ,
_D AN O.rewo6a
/
NO. OF PAGES REASON O PAGE ILLEGIBLE.
O HARD COPY RLED AT:
/
/
O BETTER COPV REQUESTED ON g PAGE 100 LARGE TO RLM.
y NARD ce nteD ar poR @
OTHER
[
FILMED ON APERTURE CARD NO.
-