ML19317G871
| ML19317G871 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/21/1975 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| Shared Package | |
| ML19317G869 | List: |
| References | |
| NUDOCS 8004020533 | |
| Download: ML19317G871 (8) | |
Text
I RANCHO SECO UNIT 'l TECHNICAL SPECIFICATIONS Surveillance Standards 4.10 EMERGENCY CONTROL ROOM FILTERING SYSTEM Applicability Applies to the emergency control room filtering system components.
Objective To verify that these systems and components will e able to perform their design functions.
Surveillance Requirements 4.10.1 The Control Room Emergency Ventilation shall be demonstrated OPERABLE:
a.
At least once per 30 days by initiating flow through the ventilation /
cooling system and demonstrating that the outside air makeup system maintains the room at positive pressure of >.005 inches W. G. rela-tive to the outside atmosphere during system operation, b.
At least each refueling interval, and (1) af ter each complete or partial replacement of a HEPA filter or charcoal adsorber bank or (2) af ter any structural maintenance on the HEPA filter or charcoal adsorber housings by:
1.
Verifying that the charcoal adsorbers remove 3,99 percent of a halogenated hydrocarbon refrigerant test gas when they are tested in place in accordance with USNRC Report DP-1082 while operating the supply fan at a flow rate of 40 cfm j; 20 percent.
2.
Verifying that the HEPA filter banks remove 3; 99 percent of the DOP when they are tested in-place in accordance with ANSI N101.1-1972 while operating the ventilation system at a flow rate of 40 cfm j; 20 percent.
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3 Subjecting at least two carbon samples removed from each charcoal bank to a laboratory carbon sample analysis and
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verifying a removal efficiency of > 90 percent for radio-active methyl Iodide at an air flow velocity of 40 f t/ min f;
. s 20 percent with an inlet methyl iodide concentration of 0.05 3
to 0.15 mg/m, ?; 95 percent relative humidity, and 3,125*F:
other test conditions shall be in accordance with USNRC RDT Standard M-16-lT, June 1972.
The carbon samples shall-be prepared by emptying one bed from a removed adsorber tray, mixing the adsorbent thoroughly, and obtaining samples at least two inches in diameter with a length equal to the thickness of'the bed.
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m RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS
-Surveillance Standards
-Surveillance Requirements'(Continued) 4.
Verifying a system flow rate of 40 cfm'+ 20 percent during system operation.
5.
. Verifying that the pressure drop across the combined HEPA
-filters, and charcoal adsorber banks is < 6 inches Water Gauge while operating the ventilation system at a flow rateof40cfm+[20 percent.
6.
Verifying that on a high radiation signal, the normal system automatically is isolated and.that the Emergency system operates.
Bases The purpose of the emergency control room filtering system is to limit particulate and gaseous fission products to which the control area would be the subjected during an accidental radioactive release in or near the Auxiliary Building.
The system is designed with a filter train which consists of a prefilter, high efficiency particulate filter, charcoal filter and a booster fan to pressurize the control room with outside air.
Since this system is not normally operated, a periodic test insure-its operability when needed.
is required to the system is available for its safety action. Monthly testing of this system will show that the system will be inspected for such things as water, oil During this test material; gasket deterioration, adhesive -deterioration in the HEPA units;
, or other foreign and unusual or excessive noise or vibration when the fan motors are running Refueling interval testing will verify the efficiency of the charcoal and -
obsolute filters when they are not required for safety during reactor shutdown 4-41a i
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. RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Survelliance Standards 4.11 REACTOR BUILDING PURGE FILTERING SYSTEM Applicability Applies to testing Reactor Building purge filters.
. 0bjective To verify thatithe Reactor Building purge filters will perform their design function.
Surveillance Requirements 4
4.11.1 The Reactor Building purge system shall be demonstrated OPERABLE:
a.
At least once per 30 days by:
1.
Initiating from the control room flow through the HEPA filter and charcoal adsorber train and verifying that the purge system operates for at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />, b.
At least once per refueling interval and (1) af ter each complete or partial replacement of a HEPA filter or charcoal adsorber bank (2) af ter any structural maintenance on the HEPA filter or or charcoal adsorber housings by:
1.
Verifying that the charcoal adsorbers remove 3; 99 percent of a halongenated hydrocarbon refrigerant test gas when they are tested in place in accordance with USNRC Report DP-1082 while operating the purge system at a flow rate of 74,000 cfm + 10 percent.
2.
Verifying that the HEPA filter banks remove > 99 percent of the DOP when they are tested in place in accordance with ANSI N101.1-1972 while operating the purge system at a flow rate of 74,000 cfm + 10 percent.
3 Subjecting at least two carbon samples removed from one of the charcoal adsorbers to a laboratory carbon sample analysis and verifying a removal efficiency of 2; 90 for radioactive methyl iodide at an air flow percent velocity of 40 ft/ min + 20 percent with an Inlet methyl Iodide concentration of 0.05 to 0.15 mg/m, 2; 95 percent 3
relative humidity, and > 125*F;'other test conditions shall. be in accordance with USNRC RDT Standard M-16-lT, June 1972.
The carbon samples shall be prepared by emptying one bed from a removed adsorber tray, mixing the adsorbent thoroughly, and obtaining samples at least two inches-In diameter and with a length equal to the thickness of the bed.
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RANCHO SECOJUNIT 1 TECHNICAL SPECIFICATIONS
. Surveillance' Standards Surveillance Requirements (Continued)-
4.
Verifying a system flow rate of 74,000 ~ cfm + 10 percent during sys tem-opera tion.
5.
Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber ba'nks is < 6 inches Water Gauge while operating the purge system at a flow rate of'74,000 cfm + 10 percent.
6.
Verifying that the air flow distribution across each HEPA filter bank and charcoal adsorber bank is within + 20_per-cent of the averaged flow per filter cartridge.
7.
Verifying that the winter / summer bypass valves can be operated to provide 18,000 cfm + 10 percent building purge rate during winter position setting.
Bases The Reactor Building purge filters are constructed with a prefilter, an absolute filter and a charcoal filter in series.
These tests will verify.
the ef ficiency of the absolute and charcoal filters.
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a RANCH 0'SECO UNIT 1 TECHNICAL SPECIFICATIONS' Surveillance Staadards 4.12 REACTOR BUILDING EMERGENCY FILTERING SYSTE_M_
Applicability Applies to testing Reactor Building emergency filters.
Objective To verify that the Reactor Building emergency filters will perform their design function.
Surveillance Requirements 4.12.1 The Reactor Building Emergency Filtering system shall be demon-strated OPERABLE:
OPERABILITY of the fans and associated cooling equipment is demon-a.
strated in Technical Specification 4.5.2.
b.
At least once per refueling interval and (1) af ter each complete or partial replacement of a HEPA filter or charcoal adsorber bank or (2) af ter any structural maintenance on the filter or charcoal adsorber housings by:
1.
Verify 179 that the charcoal adsorbers remove 3,99 percent 1
of a halogenated hydrocarbon refrigerant test gas when
,~
they are tested in place in accordance with USNRC Report DP-1082 while operating the system at a fiow rate of 40,000 cfm j; 10 percent.
2.
Subjecting at least two carbon samples removed from one of the charcoal adsorbers to a laboratory carbon sample analysis and verifying a removal efficiency of 3,99 per-cent for radioactive methyl iodide at an air flow-velocity of 40 f t/ min f; 20 percent with an inlet methyl iodide concentration of 0.15 to 0.5 mg/m, 2,95 percent 3
relative humidity, and 3 190*F; other test conditions shall be in accordance w,ith USNRC RDT Standard M-16-lT, June 1972.
The carbon samples shall be prepared by emptying one bed from a removed adsorber tray, mixing the adsorbent thoroughly, and obtaining' samples at least two inches in diameter and with a length equal to the thickness of the bed.
3 Verifying that the pressure drop across the charcoal
' adsorber banks is < 3 inches Water Gauge while operating the ventilating system at a flow -rate of 40,000 cfm j; j
10 percent.
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- _.Q RANCH 0'SECO UNIT I
- TECHNICAL SPECIFICATIONS J
Surveillance Standards Surveillance Requirements (Continued) 4.
Verifying that the air flow distribution across each charcoal.adsorber bank is within_ +; 20 percent of the-
-averaged flow per filter cartridge.
2 Bases i
The Reactor Building emergency-filters are charcoal filters.
These tests will verify the efficiency of the charcoal filters.
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RANCHO SECO UNIT 1
-TECHNICAL SPECIFICATIONS Surveillance Standards 4.16 S TORAGE POOL VENTILATION SYSTEM - FUEL MOVEMENT / STORAGE Applicability Applies to the Spent Fuel Pool ventilation system when irradiated fuel is being moved or is being stored.
Objective To verify that the Spent Fuel Pool filtering system and components will be able to perform their design functions.
Surveillance Requirements 4.16.1 When irradiated fuel which has decayed less than 90 days is in the spent fuel storage pool:
The spent fuel storage pool building ventilation system shall be a.
verified to be operating-with all spent fuel building doors closed (excepting intermittent personnel use) prior to fuel movement and 4
least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> during either fuel movement within the at spent fuel storage pool or crane operation with loads over the spent fuel s torage pool.
4.16.2 Whenever 1rradiated fuel is in the storage pool the above required spent fuel storage pool ventilation system shall be demonstrated in OPERATION:
a.
At least once per 30 days by observing flow through the HEPA filter and charcoal adsorber train 'and verifying that the train operates with < 6 inches Water Gauge pressure drop across the combined HEPA and Charcoal filter banks, b.
At least once per refueling interval, and (1) af ter each complete or partial replacement of a HEPA filter or ' charcoal adsorber. bank or (2) af ter any structural maintenance on the HEPA filter or charcoal adsorber housings by:
1.
Verifying that with the Aunillary Building exhaust system operating at a flow rate of 43,400 cfm f; 10 percent and exhausting through the HEPA filters and charcoal adsorbers, to the facility vent, provides 10,800 cfm j; 10 percent exhaust from the spent fuel pool area.
2.
Verifying that the charcoal adsorbers remove > 99 percent of a halogenated hydrocarbon refrigerant test gas when they are' tested in place in accordance with USNRC Report DP-1082 while operating the ventilation system at a flow rate of 43,400 cfm + 10 percent.
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RANCHO SECO UNIT I TECHNICAL SPECIFICATIONS Surveillance Standards Surveillance Requirements (Continued) 3 Verifying that the HEPA filter banks remove 3,99 percent of the DOP when they are tested in place in accordance with ANSI N101.1-1972 while operating the ventilation system at a flow rate of 43,400 cfm j 10 percent.
4.
Subjecting at least two carbon samples removed from one of the charcoal adsorbers to a laboratory carbon sample analysis and verifying a removal efficiency of > 90 percent for radioactive methyl iodide at ac air flow velocity of 40 ft/ min + 20 percent $sith an it.let methyl iodide concentration of 0.05.to 0.15 mg/m, 3.55 percent 3
relative humidity, and > 125'F; other test conditions l
shall be in accordance with USNRC RDT Standard M-16-lT, June 1972.
The carbon samples shall be prepared by emptying one bed from a removed adsorber tray, mixing the adsorbent thoroughly, and obtaining samples at least two inches in diameter and with a length equal to the thickness of the bed.
5.
Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is < 6 inches Water Gauge while operating the ventilating system at a flow rate of 43,400 cfm f 10 percent.
l 6.
Verifying that the air flow distribution across each i
HEPA filter bank and charcoal adsorber bank is within f 20 percent of the averaged flow per filter unit.
7 Verifying that the ventilation system maintains the spent fuel storage pool area at a negative pressure of 3,0,01 inches Water Gauge relative to the outside atmosphere during system operation.
Bases l
The Spent Fuel Pool ventilation system consists of particulate, HEPA, and charcoal filters.
These tests will verify the efficiency of the filters.
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