ML20206J556
| ML20206J556 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/23/1986 |
| From: | Scarano R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Miraglia F Office of Nuclear Reactor Regulation |
| References | |
| TAC-61908, NUDOCS 8606270196 | |
| Download: ML20206J556 (4) | |
See also: IR 05000312/1986015
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MEMORANDUM FOR:
' FEank J.'Maragila,'Jr., Director, Division of PWR
Licensing "B",
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FROM:
Ross A. Scarano, Director, Division of Radiation Safety
and Safeguards, Region V
SUBJECT:
REQUEST FOR TECHNICAL ASSISTANCE, RANCHO SECO, DOCKET NO.
50-312, CURIE LIMITS IN OUTSIDE STORAGE TANKS
In response to recent inspection findings as documented in Inspection Report
No. 50-312/86-15, an issue has developed which we request that you resolve.
The licensee's Technical Specification 3.17.3 seems to require that the 10
curie content limit be applied only to the Regenerant Holdup Tanks and outside
temporary tanks. The licensee has implemented their surveillance requirement
(Technical Specification 4.21.3) to only these tanks.
An asterisked remark in Technical Specification 4.21.3 states:
" Tanks included in this specification are those outdoor tanks that are
not surrounded by liners, dikes, or walls. capable of holding the tank
contents and that do not have tank overflows and surrounding area drains
connected to the liquid radwaste treatment system."
Several tanks such as the Borated Water Storage, Demineralized Reactor Coolant
Storage, and Miscellaneous Water Holdup Tank are located outdoors and are not
surrounded by liners, dikes, or walls capable of holding the tank contents.
The Rancho Seco FSAR does not seem to address the impact of these tank
failures on surface waters as discussed in Revision 3 of NUREG-0472.
Technical Specification 3.17.3 does not appear to be consistent with the
surveillance requirement of 4.21.3.
Please advise Region V if a curie content limit is required to be applied to
all tanks as indicated by the asterisk contained with Technical Specification 4.21.3.
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JUN 231986
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Should you have any question regarding this matter, please contact G. Yuhas
(FTS 463-3748).
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Ross A. Scarano, Director
Division of Radiation Safety
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and Safeguards
Enclosure:
Rancho Seco Technical Specifications 3.17.3 and 4.21.3
cc w/ enclosure:
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G. Kalman, NRR
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State of California
RSB/ Document Control Desk (RIDS)
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Project Inspector
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Resident Inspector
G. Cook
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B. Faulkenberry
J. Martin
Region V
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RANCHO SECO UN!T 1
TECHNICAL SPECIFICATIONS
Limiting Conditions for Operation
3.17.3
Liquid Holdup Tanks
The quantity of radioactive material contained in each of the
following tanks shall be limited to less than or equal to 10 Curies,
excluding tritium and dissolved or entrained noble gases:
'
Regenerant Holdup Tanks
a.
b.
Outside Temporary Tanks, .
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Apolicability
At all times
Action
With the quantity of radioactive material in any of the listed tanks
exceeding the above limit, immediately suspend all additions of
radioactive material to the tank, within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> reduce the tank
contents to within the limit, and describe the events leading to
this condition in the next Semiannual Radioactive Effluent Release
Report.
Bases
Restricting the quantity of radioactive material contained in the
specified outdoor tanks provides assurance that in the event of an
(
. uncontrolled release of the contents, the concentration at the
nearest surface water supply in an unrestricted area would be less
than the limits of 10 CFR 20, Appendix B, Table II, Column 2.
There
are two Regenerant Holdup Tanks. The limit applies to each tank
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individually.
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Amendment No. 53
3-72
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TECHNICAL SPECIFICATIONS
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Surveillance Standards
4. 21 . 3
Licuid . Holdup Tanks *
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the quantity of radioactive material contained in each tank listed in
Sp:cification 3.17.3 shall be detemined to be within the specified limit by
analyzing a mpresentative sample of the tank's contents at least weekly when
radioactive materials are being added to the tank.
1
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Bases
Restricting the quantity of radioactive material contained in the specified
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cutdoor tanks provides assurance that in the event of an uncontrolled release
of the contents, the concentration at the neamst surface water supply in an
unrestricted area would be less than the limits of 10CFR Part 20, Appendix 'B,
Table II, Column 2.
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- Tanks included in this spegification are those outdoor tanks that are not
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surrounded by liners, dikes, or walls capable of holding the tank contents iand
that do not have tank overflows and surmunding area drains connected to the
liquid radwaste treatment system.
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Amendment No. 53
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4-73
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