ML17272A421
| ML17272A421 | |
| Person / Time | |
|---|---|
| Site: | Columbia, Washington Public Power Supply System, Satsop  |
| Issue date: | 04/12/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Strand N WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 7905040134 | |
| Download: ML17272A421 (5) | |
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UNITEO STATES NUCLEAR REGULATORY COMMISSlON REGION V 5UITE 202, WALNUTCREEK PLAZA 1990 N. CALIFORNIA BOULEVARD
'WALNUT CREEK, CALIFORNIA 94590 April 12, 1979 Docket Nos.
50-460, 50-397 50-508, 50-509, 50-513 Washington Public Power Supply System P. 0.
Box 968 3000 George Washington Way
- Richland, Washington 99352 Attention:
Mr.
N. 0. Strand Managing Director Gentlemen:
In accordance with our letter dated April 1, 1979 transmitting Bulletin 79-05, we are enclosing Preliminary Notification 79-67S.
Sincerely, R.
H.
ngelken Director Enclosure PNO-79-67S cc w/enclosure:
M.
E. Witherspoon, WPPSS A.
D. Kohler, WPPSS J.
P.
C. Sorensen, WPPSS 79OSOC Cl>V'
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'/r' PI grM>>r IHINE0IATE PRELIMINARY HOTIFICATIOH April '[2, 1979 PREl INIHARY HOTIPItrATIOH Of'VEHT UR UNUSUAL OCCURREHCE -- PHO-79-67S This reliminar notification constitutes smear information of an event of safety or ublic inter'est siqnificance.
The information resented is a
sununarv of.information as of 7:00 a m.
on A r il ]Z 1979.
Faci~1~E:
Tb>>ei Mile Island Unit 2 Hiddletown, Pennsyl vania (DH 50-320)
~Sub'ect:
NUCLEAR INCIDENT AT THREE NILE ISLAND Plant Status Sulk coolant inlet and outlet temperatures remain at approximately ZSO degrees F.
The peak. core th rmocouples remain less than 400 degrees F
with the exception that on thermocoup1e read 401oF during reduced pressur e operation..
The. degassing operations were completed at about 0115 on Apri't.12, 1979.
The minimum reactor coolant system pressure was 303 psig.
Noise analysis eva1uations
~ndicate considerable degassing took place during these opera-tions.
Pressure is being returned to about 1000 psig and will be held at that level.
A second pressuri'zer level measuring channel failed at 2045 on April ll, 1979.
There is one original pressurizer level channel still operating.
An approved procedure is available for monitoring pressurizer level by
.balancing makeup tan'k level.
Calibration of the Heise pressure, gauge (backup level indicator installed several days ago) is planned during the current increase in pressure;. it is expected this will provide an additional method of monitoring pressurizer level.
Cooling water flow was restored to the'oolers in the containment at 0730 on April ll, 1979, and the containment temperatures have:-decreased from about 93 degrees F to about, 85 degrees F.
The hydrogen concentration in containment is about 1.61..
Preliminary results of the primary coolant samples analyzed at Oak Ridge and Savannah River have been received.
Yery little uranium was identified.
in either sample, sopporting previous analyses which formed the basis to conclude insignificant fuel melting occurred, Changeout of the Auxiliary Building filters has commenced..
Filter's on its condenser vacuum-pumps are expected to be operational today.
COHTIHUED
Continued Page 2
AprH 12, 1979, PHO-79-67-S
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j'nvironmenital Status 0917-0452 1700-1735 0.025 mR/hr mile 0.010 mR/hr 1 mile The State of Pennsylvania reported that an air samplie taken at the observation center from April 2, to April 10 indicated 1.4 picocuries per cubic meter of iodine-131.
The NRC took'a 24-hour air sample near the obser vation center starting at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> on April 10, 1979.
The results indicated 1.6 picocuries per cubic meter of iodine-131.
The 10 CFR 20 limit for iodine-131 is 100 picocuries per cubic m.ter.
Dose rates (47 locations) as measured by HRC thermo1uminescent dosimeters have ranged from'.01 to 0.02 rnilliroentgens per hour for the past 24-hour period of April 11, 1979.
These levels are in clos'e agreement with expected natural background levels.
At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on April 12, 1979, two tanks previously used as temporary storage for Unit 2 condensate storage tank overflow left the site for Hew Jersey to undergo some repair work.
The tanks had been flushed previously and sample results from one tank indicated
~levels of radioactivity of 1 x 10-6 uCi/ml gross beta activity.
Mhile the truck drivers had ob'tained property releases for the tanks they had not obtained radiation safety releases.
Shortly after the trucks departed the site, the error was realized.
-At the request CONTINUED It<MEDIATE, PRELIMINARY NOTIFICATION Offsite radiation levels identified by NRC survey teams range between
'0.02 and 0.1 mR/hr.
The radiation levels continu to be low.
I'he'esults were obtained from routine surveys performed on the east.
and west sides of'he Susquehanna River at distances up to five miles north and south of the site.
By 7:00 a.m.
on April 12, one hundred seventy-six local residents were scanned with the whole-body counter which was set up in Hiddletown.
.The scan results reported do not indicate radiation 'levels above normal. body levels.
Over 650 individuals have signed up to be scanned.
The foUowing Aerial t'Ieasuring System surveys were conducted on April 11.
These were previously reported as ARHS surveys.
Minds were calm during these surveys.
TTTiime tfax. Radiation Level Distance from Site
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r Continued Page 3
April 12, 1979 PN0-79-67-S Apa~~sys
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PN0-79-67N, dated April 8 - Item b on page 3 listed the HPC for iodine-13'l as 100 picocuries per liter. It should have read 300 picocuries per liter.
PN0-79-67R, dated April 11 - On page 2, tne ARMS results were listed as 0.15 mR/hr,for the 1833 to 1913 survey.
It should have read 0.015 mR/hr.
Also the ARMS surveys were described as being in sector 310o far the 0627-0800 survey and in sector 340o for the 1833 - 1913 survey.
It should have read
'l30o and 160
, respectively.
Contact:
Transmitted'H St 4ffY Chairman Hendrie Comm ss'ioner Bradford Co!rmiss ioner Kennedy Corrroissioner Ahearne Conmissioner Gilinsky Transmitted:
HHBB ~+3 L. V. Gossick, E00 H. L. Ornstein, EDO J. J. Fouchard, PA N. H. Hailer, blPA R. 6. Ryan, OSP-H. K. Shapar, ELD P. Bldg ~/lL H.
R. Denton, NRR R.
C. DeYoung,, NPR R. J
N. J. Dircks, NESS.
S. Levine, RES IE (THI) Site 0'Provide copy to STAT"=)
Mhite House Situation oom FDAA~l+Q (Provide copies to he Administrator EPA NE/EOC 6 9 PEI'@
BRP (State of'A)
DCPA ffSH (~pickup Handcarry (FAA)
IHHEDIATE PRELIMINARY NOTIFICATION S. J
~ Chalk, SECY C.
C. Ka!rmerer, CA
{For Distribution)
J.
G. Davis, IE Region I ~<a~Z.
Region II~~
Region IIIg~>Z~
Region IV~s!~
(~Par L" J. J. Cueengs, OIA R. Ninogue, SD and the Operations Center) of the Unit 2 Shift Supervisor, NPC personnel contacted the Pennsylvania State Police and the truck from which the high gross beta activity sample was obtained was intercepted abou 5 miles outside of Harrisburg and escorted back to the site where it arrived at about.0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />.
The returned tank was surveyed and no leakage or external radiation levels were de'tected.
A sample of'he tank's r'esidual liquid contents was taken and is being analyzed.
The licensee is making proced!iral revisions to prevent recurrence of the problem.
Corrections: