ML19320B923
| ML19320B923 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/08/1980 |
| From: | METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19320B920 | List: |
| References | |
| NUDOCS 8007150502 | |
| Download: ML19320B923 (4) | |
Text
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a Three Mile Island Nuclear 5 cation,-Unic II
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- Operating Li,:ense No. DPR-73 i,)
Docket No.30-320 Recovery Operations Plan Change Recuest No. 2 The licensee requests that pages 4.9~1 and 4.9-2 of the Recovery Operations Plan for'TMI-II be replaced. The replacement pages are attached to this submittal.
Reason for Change After the March 28, 1979,_ incident at Three Mile Island, the plant ventilation stack,.used to provide an effluent pathway for Auxiliary Building and Fuel Handling Building ventilation exhaust-flow streams, was fitted with an end cap to render it inoperable.
Supplementary ventilation units, consisting of additional fans and filters, were added to the ventilation system to.
(1) incrcasa system flow rates, 'and (2) provide additional filtering of the flow stream prior to discharge.
Because of the addition of the supplementary ventilation system to the existing building _ ventilation system, increased system flow rates were achieved.
Upon return of the ventilation system to its normal operational configuration, the supplementary fans will no longer be-available for the achievement of higher than design ventilation flow rates. The design flow rates for each of the building ventilation systems are:
Auxiliary Building 65,000 cfc Fuel 2andling Building 36,000 cfm These flou rate values are reported-in Sections 9.4.2.2 and 9.4.3.2 of the TMI-II Final Safety Analysis Report and are sufficient for the performance of proper ventilation system operation to accomplish the objectives of:
(1) building heat removal, (2) maintenance of the building at a negative pressure, relative to the atmosphere, and (3) atmospheric radiological control.
Although supplementary ventilation units have been added to the ventilation flow
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stream, it is not prudent to require that this flow stream operate at a higher flow rate than the original system design. Therefore, the proposed Recovery Operations Plan change request is based on the original ventilation system design flow rates for the accomplishment of the above-listed objectives.
Safety Evaluation Justifying Change No' safety evaluation is ' required for the justification of this change. This proposed change' requires the verification of system operation in accordance with its design.
gew1509%
~ Amendment Class The proposed change is a change to the TMI-II 2ecoverf Operations Plan.
Since these changes do not require pavnent of a fee for arocessine the change, no payment is enclosed.
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SURVEILLANCE REOUIREMENTS 4.9 LIOUID RADIOACTIVE WASTE STORAGE FUEL fiANDLING BUILDING / AUXILIARY BUILDING AIR CLEANUP SYSTEMS 4.9.12 The fuel handling building air cleanup system and the auxiliary building air cleanup system shall be demonstrated OPERABLE:
At least'once per 31 days by initiating, from the control room, flow a.
through the HEPA filters and charcoal adsorbers and verifying that each filter train operates for at least 15 minutes.
b.
Initially and at least once per 18 months of (1) after any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any ventilation zone communicating with the system by:
1.
Verifying a flow rate of 23,000 cfm i 10% for each fuel handling building exhaust filter train when tested in accordance with ANSI N510-1975.
2.
Verifying a flow rate of 36,000 cfm i 10% for each auxiliary building exhaust filter train when tested in accordance with ANSI N510-1975.
c.
At least once per 15 =enths by:
1.
Verifying an exhaust flow rate of at least 36,000 cfm for the fuel handling building air cleanup system with two fuel handling building supply fans and two fuel handling building exhaust fans in operation.
2.
Verifying an exhaust flow rate of at least 65,000 cfm for the auxiliary building air cleanup system with two auxiliary building supply fans and two auxiliary building exhaust fans in operation.
3.
Verifying that -the pressure drop across the combined HEPA filters and charcoal'adsorber banks of each fuel handling building filter train is less than 6 inches Water Gauge while it operates at a flow rate of 23,000 cfm i 10%.
4.
Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks of each auxiliary building filter train is less than 6 inches Water Gauge while it operates at a flaw t te of 36,000 cfm i 10%.
THREE MILE ISLAND 4.9-1 L.
PURVEILLANCE REOUIREMENTS 5.
, Verifying that the fuel handling building air cleanup system maintains the fuel handling building at a negative pressure of greater than or equal to 1/8. inch Water Gauge relative to the outside atmosphere during system operation.
6.
fVerifying that the auxiliary building air cleanup system main-tains the auxiliary building at a negative prersure of greater
.than or equal to 1/8 inch Water Gauge relative to the outside atmosphere during system operation.
7.
Verifying that each fuel handling building filter train satisfies
.the in-place testing acceptance criteria and uses the test procedures of Regulatory Positions C.5.a and C.5.c of Regulatery Guide 1.52, Revision 2, March 1978, and the system flow rate is 23,000 cfm i 10%.
8.
Verifying'that each auxiliary building filter train satisfies the in-place testing acceptance criteria and uses the test procedures of Regulatory Positions C.S.a and C.5.c of Regulatory Guide 1.52, Pevision 2, thrch 1978, and the system flow rate is 36,000 cfm 10%.
d.
After each complete or partial replacement of a HEPA filter bank in a fuel handling Suilding filter train by verifying that tha Z ??.
filter banks in this filter train renove greater than or ecual to 99.95% of the DOP when they are tested in-place in accordance with ANSI N510-1975 while operating the filter train at a flow race of 23,000 cfm i 10%.
e.
After each complete.or partial replacenent of a HEPA filter bank in an auxiliary building filter train by verifying that the HEPA filter badkf in this filter train renove greater than or equal to 99.95% of the DOP when they are tested in-place in accordance with ANSI N510-1975 while operating the filter train at a flow rate of 36,000 cfm i 10%.
A THREE MILE-ISLAND.
-4.9-2
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