ML20101E510

Application for Amend to License DPR-72,consisting of Rev 1 to Tech Spec Change Request 121,providing Addl Restrictions for Auxiliary Bldg Ventilation Sys Inoperability to 7 H Per 30 Days

ML20101E510
Person / Time
Site:	Crystal River
Issue date:	12/19/1984
From:	FLORIDA POWER CORP.
To:
Shared Package
ML20101E505	List: 3F1284-14, Forwards Application for Amend to License DPR-72,consisting of Rev 1 to Tech Spec Change Request 121.Rev Provides Addl Restrictions to Auxiliary Bldg Ventilation Sys Inoperability ML20101E510 ML20101E533
References
NUDOCS 8412260280
Download: ML20101E510 (2)

Text

.

i 4

FLORIDA POWER CORPORATION CRYSTAL RIVER UNIT 3 DOCKET NO. 50-302/ LICENSE NO. DPR-72 REQUEST NO.121, REVISION 1

- AUXILIARY BUILDING YENTILATION SYSTEM LICENSE DOCUMENT INVOLVED:

Technical Specifications (Appendix A)

PORTION:

3.7.8.1 Auxiliary Building Ventilation Exhaust System DESCRIPTION OF REQUEST:-

Add on ACTION statement to Specification 3.7.8.1 requiring a plant shutdown if inoperable pairs of exhaust fans or filter systems cannot be restored to operable within 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.

Specifically add the following ACTION statement:

b.

With more than one pair of exhaust fans or - more than one filter system inoperable, restore one inoperable pair of fans or systems to OPERABLE status within 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />."

Additionally, add footnote 2 which stated:

"The cumulative downtime, excluding surveillance testing, of the total Auxiliary Building ventilation system shall be limited to 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> during any and all 30 day periods."

REASON FOR REQUEST:

Florida Power Corporation requests this change to allow a sufficient length of time for maintenance and/or repair of exhaust fans and filter units. Currently, if maintenance must be performed on all fans or all filter systems during POWER OPERATION, the restrictions of Specification 3.0.3 apply. Within I hour actions must be taken to place the unit in HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. This is not enough time to perform maintenance, test the systems and return the system to OPERABLE status.

. EVALUATION OF REQUEST:

The purpose of the Auxiliary Building Ventilation Exhaust System is to:

1)

Provide suitable ambient conditions in the Auxiliary Building during all MODES of OPERATION. 8412260200 841219 1

PDR ADOCK 05000302 P-PDR

A

's-

~2) l Mitigate the unfavorable conditions in the Auxillary Building following an accident.

i

'3)

Mitigate the consequences of an accident by filtering the release. '

~

The; accidents for which the Auxiliary Building Ventilation System was assumed to operate include the Fuel Handling Accident (FSAR Section 14.2.2.3.1), Failure of Small Lines Carrying Primary Coolant Outside the Reactor Building (t<5AR 5ection 14.2.2.6), and the Waste Gas Tank Rupture (FSAR Section 14.2.2.8)..

with the approval of this Technical specification Change, the ability of this system to perform _ its safety functions will not be significantly degraded. For the brief amount of time allowed for inoperability (12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />), suitable ambient conditions can be maintained in

- the building. To prevent an accident from occurring while this system is inoperable, specification 3.9.12 requires that fuel movement be suspended.

If one of the accidents above was to occur while the Auxiliary Building Filters are

- inoperable the resultant doses are still well within 10 CFR 100 guidelines (300 Rem to the thyroid and 23 Rem whole body). The Fuel Handling Accident analysis does not assume any filtration, therefore, the integrateo dose at the Exclusion Boundary remains 14 Rem to the thyroid and.19 Rem whole body. The analysis for the Failure of Small Lines assumes that airborne nuclides are filtered through the Mt:PA and charcoal filters (90% iodine removal efficiency), with an integrated dose of.115 Rem thyroid and.066 Rem whole body. Without -

taking credit for charcoal filtration the integrateo dosage becomes 1.15 Rem thyroid and

.068 Rem whole body. The Waste Gas Tank Rupture analysis indicates that integrated doses of 1.43 Rem thyroid and.92 Rem whole body would result.

without taking credit for charcoal filtration the doses become 14.3 Rem thyroid and.92 Rem whole body.

Tne current requirements to shutdown the reactor with the ventilation system shutdown

- does not decrease the likelihood or consequences of an Auxiliary Building accident. Thus

' deferring (from one hour to seven hours) an action that has a minimal gain will have little or no safety impact.

1 :-

' m