ML19319D991
| ML19319D991 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/14/1977 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| Shared Package | |
| ML19319D990 | List: |
| References | |
| NUDOCS 8003270702 | |
| Download: ML19319D991 (10) | |
Text
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RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Limiting Conditions for Operation 3.13 AIR FILTER SYSTEMS Applicability This specification applies to the operability of the emergency control room fi ltering system, the Auxiliary and Spent Fuel Building filter systems, and the Reactor Building emergency filtering system.
Objective To assure that these systems will be able to perform their design functions.
Specification 3 13.1 The emergency control room filter system and the Reactor Building emergency filtering systems shall be operable at all times when containment integrity is required, except as noted in 3.13 3 and 3.13.4 below.
3.13.2 One Auxiliary and Spent Fuel Buildings filter unit must be operable.
The reactor shall be placed in a hot shutdown condition within twelve (12) hours any time both units become inoperable.
3.13 3 If the emergency control room filter system becomes inoperable during reactor operation, it is permissible to continue reactor operation for only the succeeding thirty (30) days.
3.13.4 ff one of the two RB emergency filters is made, or found to be, inoperable for any reason, reactor operation is permissible only during the succeeding thirty (30) days provided that all active components of the other in-containment air treatment circuit shall be demonstrated to be operable within two (2) hours and every seven (7) days thereafter.
The reactor shall be placed in a hot shutdown condition within twelve (12) hours any time both emergency filter units become inoperable.
Bases The time to return a Reactor Building Emergency Filter to operability is allowed because two 50% capacity RB Spray Systems and the other RB Emergency Filter are available for SFAS requirements. Tech Spec 3.3 2 covers fan and cooler opeimbility.
See also Sections 4.10, 4.11 and 4.12.
O 8003270 Proposed Amendment No. 32 Rev. 2 (Reissue)
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RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards 4.10 EMERGENCY CONTROL ROOM FILTERING SYSTEM Applicability Applies to the emergency control room filtering system components.
Obj ec t ive To verify that this system and its components will be able to perform their design functions.
Surveillance Requirements 4.10.1 The Control Room Emergency Ventilation System shall be:
A.
Demonstrated operable at least once per quarter by initiating flow through the ventilation / cooling system and demonstrating that the outside air makeup system flow is 40 cfm j; 20 percent.
B.
Demonstrated operable at least once per refueling interval, or (1) af ter any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in the operating air makeup system, 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 ANSI N510 while operating the filter train at a flow rate of 40 cfm f; 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 N510 while operating the filter train at a flow rate of 40 cfm f; 20 percent.
3 Verifying within 31 days af ter removal that a laboratory analysis of a carbon sample from either at least one test canister or carbon sample removed from one of the charcoal adsorbers demonstrates a removal efficiency of 2.95% for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 (80 C, 95% R.H.).
The carbon samples not obtained from test canisters shall be prepared by either:
(a)
Emptying one entire bed from a removed adsorber tray, mixing the adsorbent thoroughly, and obtaining samples i
at least two inches in diameter and with a length equal to the thickness of the bed.
Proposed Amendment No. 32 Rev. 2 (Reissue)
A-41A
4 Surveillance Requi rements (Continued) 4.10.1 B.
3 (b)
Emptying a longitudinal sample from an adsorber tray, mixing the adsorbent thoroughly, and obtain?ng samples at least two inches in diameter and with a length equal to the thickness of the bed.
4.
Verifying that the pressure drop across the combined HEPA filters, and charcoal adsorber banks is <6 inches Water Gauge while operating the ventilation makeup system at a flow rate of 40 cfm + 20 percent.
5 Verifying that on a high radiation signal, the normal system automatically is isolated and that the Emergency System operates.
6.
Verify the air makeup system maintains the room at a positive pressure of >.005 inches W.C. relative to the outside atmosphere with a flow of 40 cfm + 20 percent.
C.
Following original installation, modification, or major repair of the' system, verify that the air flow distribution across the filter bank is uniform in accordance with ANSI N510.
D.
Demonstrated operable af ter every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation by:
1.
Verifying within 31 days af ter removal that a laboratory analysis of a carbon sample from either at least one test canister or carbon sample removed from one of the charcoal adsorbers demonstrates a removal efficiency of 2.95% for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 (80 c, 95% R.H.).
The carbon samples not obtained from test canisters shall be prepared by either:
(a)
Emptying one entire 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.
(b)
Emptying a longitudinal sample from an 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.
4 (c) After reinstallation of the samples adsorber tray, verify that the charcoal adsorbers remove 3,99 percent of a halogenated hydrocarbon refrigerant test gas when they are tested in place in accordance with ANSI N510 while operating the filter train at a flow rate of 40 cfm + 20 percent.
Proposed Amendment No. 32 Rev. 2 (Reissue)
Survelliance Requirements (Continued)
' 4.10.1 D.
1.
(d) Verify that the HEPA filter bank removes >99 percent of the DOP when tested in place in accordance with ANSI N510 while operating the filter train at a flow rate of 40 cfm
+ 20 percent.
Bases The purpose of the emergency control room filtering system is to limit the particulate and gaseous fission products to which the control room area would be subjected during an accidental radioactive release in or near the Auxiliary Building. The system is designed with a filter train which consists of a crefilter and charcoal filter ahead of a high efficiency particulate filter, and charcoal filter with a booster fan to pressurize the control roon, with outside air.
Since this system is not normally operated, a periodic test is required to insure its operability when needed.
Quarterly testing of this system will show that the system is available for its safety action.
During this test the system will be inspected for such things as water, oil, or other foreign material; gasket deterioration; adhesive deterioration in the HEPA filter; and unusual or excessive noise or vibration when the fan motors are running.
The flow of 40 cfm was selected to limit the maximum radiation dose to occupants of the control room in an accident.
For this analysis, both charcoal filter banks were assumed to provide DF's of 10, while the HEPA filter DF is assumed to be 100.
Refueling interval testing will verify the methyl iodide removal efficiency of the charcoal and the amount of leakage past the charcoal and absolute filters.
The system is automatically started, and the normal system isolated, when the radiation level in the control room increases, or manually whenever desired by the operator.
The testing required af ter painting, fire or chemical release, is not to be interpreted to include minor touch-up painting, lighted cigarettes, housekeeping chemicals and detergents, or other similar act*vities common to the normal routine.
Proposed Amendment No. 32 Rev. 2 (Reissue) 4-41-C
4
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RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards 4.11 AUXILIARY AND SPENT FUEL BUILDING FILTER SYSTEMS Applicability Applies-to the Auxiliary Building exhaust filter system and to the Spent Fuel Pool Building when irradiated fuel is being moved or is stored in it.
Obj ective To verify that the Auxiliary Building exhaust filter system and components will be able to perform their design functions.
Surveillance Requirements 4.11.1 When irradiated fuel which has decayed less than 90 days is in the spent fuel storage pool:
A.
The spent fuel storage pool building exhaust ventilation system shall be verified to be operating with all spent fuel building doors closed (excepting intermittent personnel use) prior to fuel movement and at 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 spent fuel storage pool or crane operation with loads over the spent fuel storage pool.
4.11.2 Proper Operation of ventilation system shall be verified:
A.
At least once per month by observing flow through the operating HEPA filter and charcoal adsorber train and verifying that the train operates with <6 inches Water Gauge pressure drop across the combined HEPA chd Charcoal filter banks.
B.
At lease once per refueling interval or (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 operating system 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 ANSI H510 while operating the filter train at a flow rate of 43,400 cfm + 10 percent.
2.
Verifying that 'he HEPA filter banks remove 2,99% of the DOP when they are tested in-place in accordance with ANSI N510 while operating the filter train at a flow rate of 43,400 cfm
+ 10%.
Proposed Amendment No. 32 Rev. 2 (Reissue)
Surveillance Requirements (Continued) 4.11.2
-B.
3 Verifying that with the Auxiliary Building exhaust system operating at a flow rate of 43,400 cfm + 10 percent and exhausting through the HEPA filters and charcoal adsorbers, to the facility vent, provides 10,800 cfm + 10 percent
-exhaust from the spent fuel pool area.
4.
Verifying within 31 days af ter removal that a laboratory analysis of a carbon sample from at least one test canister or carbon sample removed from one of the charcoal adsorbers demonstrates a removal efficiency of 395% for radioactive Methyl lodide when the sample is tested in accordance with ANSI N510 (80 C, 95% R.H.).
The carbon samples not obtained from test canisters shall be prepared by either:
(a)
Emptying one entire 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.
(b)
Emptying a longitudinal sample from an 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.
C.
Verify that the air distribution across the adsorber section is uniform, per ANSI N510, following original installation, modifi-cation, or major repair.
C.
Demonstrated Operaole after-every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation by:
1.
Verifying within 31 days after removal that a laboratory analysis of a carbon sample from at least one test canister or carbon sample removed from one of the charcoal adsorbers demonstrates a removal efficiency of 2.95% for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 (80 C, 95% R.H.).
~The carbon samples not obtained from test canisters shall be prepared by either:
(al Emptying one entire 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 thc thickness of the bed.
(b)
Emptying a longitudinal sample from an 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.
(c)
After reinstallation of the sampled adsorber tray, verify that the charcoal adsorbers remove 1.99% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510 while operating the filter train at a flow rate of 43,400 cfm
"'+ 10 percent.
Proposed Amendment Mo. 32 Rev. 2 (Reissue)
Avn
Surveillance Requirements (Continued) 4.11.2 D.
1.
(d) Verify that the HEPA filter bank removes >99% of the DOP when tested in place in accordance with ANSI N510 while operating the filter train at a flow rate of 43,400 cfm + 10%.
Bases The Auxiliary Building exhaus* system consists of two full capacity units arranged to take suction from a common pienum, draw the air through HEPA and charcoal filter banks and discharge it into the plant vent.
Only one unit is operated at a time, allowing the other to be serviced or held in reserve.
This system draws all of the potentially radioactively contaminated air in the plant, external to the Reactor Building, through it.
The following major areas are served:
1)
Spent Fuel Building
- 2) Radio-Chemical Lab Hoods and Service Area 3)
Radwaste Area
- 4) Waste Gas Discharge
- 5) Condenser Air Ejector Exhaust
- 6) Various Instrumentation and Sampling Discharges As a consequence of providing s ervice to these areas the filters provide a DF of 10 for radioactive iodine and a DF of 100 for particulate matter which may be released in the following assumed accidents:
1)
Letdown Line rupture outside the Reactor Building 2)
Post _LOCA Decay Heat Removal Leakage 3)
Dropped Fuel Assembly in Spent Fuel Pool 4)
OTSG Tube Rupture in-place leakage testing of the filts s demonstrates their integrity and the DF of the HEPA bank.
The laboratory esting of charcoal will demonstrate the suitability for a bank to remain in service as well as provide an estimate of its remaining service life.
The testing required after painting, fire or chemical release, is not to be interpreted to include minor touch-up painting, lighted' cigarettes, housekeeping chemicals and detergents, or other similar activities common to the normal routine.
Proposed Amendment No. 32 Rev. 2 (Reissue) 4-42-c
i 1
RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards 4.12 REACTOR BUILDING EMERGENCY FILTERING SYSTEM Applicability Applies to testing Reactor Building emergency air filters.
Object ive To verify that the Reactor Building emergency air filters will perform their design functior.
Surveillance Requirements 4.12.1 The Reactor Building Emergency Filtering System shall be demonstrated OPERABLE:
A.
OPERABILITY of the fans and associated cooling equipment is demonstrated in Technical Specification 4.5.2.
B.
At least once per refuefing interval or (1) after any structural maintenance on the charcoal adsorber housings, or (2) following painting, fire or chemical release in any ventilation zone communicating with the operating system, by:
(1) Verifying within 31 days af ter removal that a laboratory analysis of a carbon sample from either at least one test canister or carbon sample removed from one of the charcoal adsorbers demonscrates a removal efficiency of >85% for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 (130 C, 95% R.H.).
The carbon samples shall be prepared by either:
(a)
Emptying one entire 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.
(b)
Emptying a longitudinal sample from an 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.
(2) Verifying a filter train flow rate of 40,000 cfm +10% during rystem operation when tested in accordance with ANSI N510.
C.
Verify that the air distribution across the adsorber section is uniform, per. ANSI N510, following original installation, modifi-cation, or major repair.
Proposed Amendment No. 32 Rev. 2 (Reissue)
MM
.r, Surveilla'nce Requirements (Continued) 4.12.1 D.
Demonstrated operable af ter every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoat adsorber operation by:
(1) Verifying within 31 days af ter removal that a laboratory analysis of a carbon sample from either at least one test canister or carbon sample removed f rom one of the charcoal adsorbers demonstrates a removal efficiency of >85% for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 (130 C, 95% R.H.). The carbon samples not obtained from test canisters shall be prepared by either:
(a)
Emptying one entire 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.
(b)
Emptying a longitudinal sample from an 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.
Bases The Reactor Building emergency filters are charcoal adsorbers used post LOCA to remove iodine from the Containment atmosphere.
In this application credit was taken for 85% iodine removal efficiency.
.In place filter leakage testing,' with refrigerant gas, is not required for recirculating systems located within reactor containment as long as the adsorbent ~is sampled and tested per ANSI N510 as described above. Operability is adequately demonstrated in Technical Specification 4.5.2.
The testing required after painting. fire or chemical release, is not to be interpreted to include minor touch-up painting, lighted cigarettes, housekeeping chen.icals and detergents, or other similar activities common to the normal routine.
l Proposed Amendment No. 32 Rev. 2 (Reissue)
MTL
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$SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT C 1708 59th Street, Box 15830 Sacramento, Cahfornia 95813;(916) 452 3211 March 10, 1976 m[ m,.s.
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Washington, D.C.
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Re: Docket No. 50-312 Proposed Amendment No. 41 to License DPR-54 Rancho Seco Nuclear Generating Station, Unit No. 1
Dear Sir:
In accordance with 10 CFR 50.59, the Sacramento Municipal Utility District hereby proposes to amend its Operating License DPR-54 for Rancho Seco Nuclear Generating Station, Unit No. 1, by submitting forty (40) copies of Proposed Acendment No. 41.
This proposed amendment replaces Figure 6.2-1 of Appendix A with an updated chart reflecting the current SMUD organization.
Figure 6.2-1 was included in Change No. 2 to Technical Specifications which was issued by the NRC December 31, 1975. The original submittal date of the proposed amendment was December 12, 1974, and addenda addressing themselves to Regulatory Guide 1.16 were submitted August 27, 1975 cnd October 5, 1975.
Since the submittal the District organization has been altered and the organizational chart in Technical Specifications should be changed accordingly.
Respectfully submitted, 1$A J. J. Mattimoe Assistant General Manager and Chief Engineer Enclosure
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