ML19308E163
| ML19308E163 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/19/1973 |
| From: | Rodgers J FLORIDA POWER CORP. |
| To: | Deyoung R US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| 7111, NUDOCS 8003240680 | |
| Download: ML19308E163 (4) | |
Text
.2 AEC D' RIBUTION FOR PART 50 DOCKET MA* IIAL g'
(TDiPORARY FOPJi)
CONTROL NO:
7111 FILE:
FROM:
DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Florida Power Corporation St. Petersburg, Fla. 33733 Mr. J. T. Rodgers 9-19-73 9-24-73 X
TO:
ORIG CC OTHER SENT AEC PDR XXX 1
SENT LOCAL PDR XXX R.C. DeYoung CLASS UNCLASS PROP INFO INPUT NO CYS PIC'D DOCKET N0:
XXX 40 50-302 DESCRIPTION:
ENCLOSURES:
Ltr in re to our 7-19-73 ler..... concern.
the design of the Borated Water Storage Tanks.
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PLANT NAME: Crystal River aviv- -
- J FOR ACTION /INFORMATION 9-24-73 JB BUTLER (L)
SCIMENCER(L)
ZIEMANN(L)
REGAN(E)
W/ Copies W/ACopies W/ Copies W/ Copies CLARK (L)
STOLZ(L)
DICKER (E)
W/ Copies W/ Copies W/ Copies W/ Copies COLLER(L)
VASSALLO(L)
KNIGHION(E)
W/ Copies W/ Copies W/ Copies W/ Copies KNIEL(L)
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/GRRIES LIC ASST BRAIIMAN OGC, ROOM P-506A SCHROEDER
/ CAMMILL DIGGS (L)
SALTZMAN MUNTZING/ STAFF
/MACCARY YKASTNER GEARIN (L)
/ CASE
/ KNIGHT BALLARD
/GOULBOURNE (L)
PLANS
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/,PAWLICKI SPANGLER LEE (L)
C'CDONALD BOYD-VSHA0 MATGRET (L)
DUBE MOORE (L)(BWR)
/STELLO ENVIRO SEr E E (L)
/ DEYOUNG(L)(PWR) ti10USTON MULLER SHEPPARD (E)
INFO SKOVHOLT (L)
/NOVAK DICKER SMITH (L)
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/ ROSS KNIGHTON TEETS (L)
/ IPPOLITO YOUNG 3LOOD WADE (E)
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/REGAN WILLIAMS (E)
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September 19, 1973 c.........~
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Mr. R.C. DeYoung Assistant Director for Pressurized Water Reactors
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Directorate of Licensing
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United Stated Atomic Energy Commission
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IN RE: FLORIDA POWER CORPORATION
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CRYSTAL RIVER NUCLEAR GENERATING PLANT 3
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DOCKET NO. 50-302 a
Dear Mr. DeYoung:
As requested in your July 19, 1973, letter concerning overflow of the refueling water storage tanks into uncontrolled water pathways, we have reviewed the design of the Refueling Water Storage Tank (Borated Water Storage Tank) System and other liquid tanks which contain radioactivity at our Crystal River facility to detennine if overflow or excessive leakage from these tanks could result in an uncontrolled release of radioactive liquid to the environs. The results of our review are as follows:
The Borated Water Storage Tank (BWST) serves two (2) majof functions: emergency and normal.
The emergency function of the BWST is to supply borated water to the associated emergency safeguards systems (i.e.,
HPI, LPI, and Building Spray). During this mode no administrative control is required relative to overflow due to the fact that the tank is being progressively drained, subsequently not filled. The normal function of the BWST is to supply borated water to the fuel transfer canal in preparation for fuel handling.
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- Q 4 Water supply to the BWST which could result in overflow t
of same is via four (4) independent means as follows:
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4'/ j,,i 6 7Ill General Office 3201 Thirty-fourtn street soutn. P.O Box 14042. St. Petersburg. Rorida 33733 e 813,45151 l
Mr. R.C. DeYoung September 19,'1973 1.
8" dia. Decay Heat Removal $ystem discharge.
2.
8" dia. Spent Fuel Cooling System discharge.
4" dia.
3.
4" dia. Reactor Building Spray System recirculation.
4.
21/2" dia. Demineralized Water System supply.
The following analyses have been performed in order of overflow criticality relative to the above modes of filling the BWST.
1.
Following refueling the transfer canal is drained to the Reactor Vessel flange level by switching the discharge of one of the Decay Heat Removal pumps from the reactor injection nozzle to the BWST. The filling rate of the BWST by the Decay Heat pump is approximately 3000 gpm.
The level instruments providing overflow protection for the BWST are dvAicate level transmitters and a level switch. The transmitters indicate a range of 0-50 ft. on E.S. Panels "A" and "B".
The level switch actuates a high level alarm in the control room when tank level reaches a height of 43 ft. The overall straight side height of the BWST is 47 ft. with an overflow connection located at 58 ft. - 5 in. The difference in height from the high level alarm to the overflow connection of 15 ft. - 5 in. corresponds to-approximately 53,000 gallons. Therefore from the time of high level alarm initiation to the overflow condition, at a filling rate of 3000 gm, the operator is allowed approximately seventeen (17) minutes to take corrective action.
2.
Further draining of the fuel transfer canal is performed via one of the Spent Fuel Cooling System strings.
Under these conditions the discharge rate to the BWST is approximately 1500 gpm. The time required for an operator to take corrective action, thus preventing BWST overflow in this mode, is approximately thirty-four(34) minutes.
Items 3 and 4 of the above do not require extensive analysis due to the substantially increased " elative time span concerned in order for corrective action to be initiated. Assuming that the BWST level indicators are not monitored and the BWST high level alarm fails, the BWST would overflow to the Auxiliary Building sump, which discharges to the miscellaneous waste storage tank, providing a controlled
Mr. R.C. DeYoung September 19, 1973 water pathway to the environs. BWST overflow to the Auxiliary Building sump would inmediately initiate the sump pumping action and high level alarm.
In the event the following tanks, which could contain radioactive liquid, should experience an overflow condition due to level indication and/or alarm failure, the overflow effluent is discharged by way of a controlled water pathway to the environs.
1.
Reactor Coolant bleed tanks.
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2.
Concentrated boric acid tanks.
3.
Concentrated waste storage tanks.
4.
Evaporator condensate storage tanks.
5.
Miscellaneous waste storage tank.
6.
Spent resin storage tank.
Also, review of our ' Operating Procedures indicates that they sufficiently provide for operator surveillance and proper action concerning liquid storage tanks which contain radioactivity.
In summary, we are protected against an uncontrolled release of radio-active liquid to the environs due to an overflow of the refueling water storage tank system or other tanks containing radioactive liquids at Crystal River Unit #3.
hery truly yours, J. f. Rodgers Assistant Vice President JTR/ns e
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