Text

Proposed Tech Specs Re Requirements for Lab Sample Analysis of Charcoal Adsorbers to Reflect Latest ASTM Std
	ML18037A488
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Site:	Browns Ferry
Issue date:	09/29/1993
From:	; TENNESSEE VALLEY AUTHORITY
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ML18037A487	List: ML18037A486; ML18037A488;
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	NUDOCS 9310050138
	Download: ML18037A488 (37)
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ENCLOSURE 1 PROPOSED TECHNICAL SPECIFICATION CHANGE BROWNS FERRY NUCLEAR PLANT UNITS 1, 2,

AND 3 (TVA BFN TECHNICAL SPECIFICATION AMENDMENT 341) 93i0050i38 930924 PDR ADOCK 05000259 P ', PDR,,

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TECHNICAL SPECIFICATION 341 EFFECTIVE PAGE LISTING UNIT 1 3.7/4.7-14 3.7/4.7-19 3.7/4.7-21 3.7/4.7-33 3.7/4.7-37 3.7/4.7-38 UNIT 2-3.7/4.7-14 3.7/4.7-19 3.7/4.7-21 3.7/4.7-33 3.7/4.7-37 3.7/4.7-38 UNIT 3 3.7/4.7-14 3.7/4.7-19 3.7/4.7-21 3.7/4.7-32 3.7/4.7-36 3.7/4.7-37

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PROPOSED TECHNICAL SPECIFICATION CHANGE BROMNS FERRY NUCLEAR PLANT UNIT 1 (TVA BFN TECHNICAL SPECIFICATION AMENDMENT 341)

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CO AI SS MS L'IMITING CONDITIONS FOR OPERATIO SURVEILLANCE RE UIREME S

3.7.B. Standb Gas Treatment S stem 4.7.B.

Standb Gas Treatment

~Ss tetg

2. a. The results of the in-place cold DOP and halogenated hydrocarbon tests at g 10%

design flow on HEPA filters and charcoal adsorber banks shall show g99%

DOP removal and g99% halogenated hydrocarbon removal when tested in accordance with ANSI N510-1975.

2 ~ a ~ The tests and sample analysis of Specification 3.7.B.2 shall be performed at least once per operating cycle or once every 18 months whichever occurs first for standby service or after every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b. The results of laboratory carbon sample analysis shall show g90% radioactive methyl iodide removal when tested in accordance with ASTM D3803.

b. Cold DOP testing shall be performed after each complete or partial replacement of the HEPA filter bank or after any structural maintenance on the system housing.

c. System shall be shown to operate within gl0% design flow.

c ~ Halogenated hydrocarbon testing shall be performed after each complete or partial replacement of the charcoal adsorber bank or after any structural maintenance on the system housing.

BFN Unit 1 3.7/4.7-14

4 CO AINME SYSTEMS LIMITI G CO ITIONS FOR OPERATION SURVEILLANCE RE UIREME S

3.7.E. Control Room Emer enc Ventilatio 4.7.E Control Room Emer enc Ventilation

l. Except as specified in Specification 3.7.E.3 below, both control room emergency pressurization systems shall be OPERABLE at all times when any reactor vessel contains irradiated fuel.

l. At least once every 18 months, the pressure drop across the combined HEPA filters and charcoal adsorber banks shall be demonstrated to be less than 6 inches of water at system design flow rate (g 10%).

2. a.

The results of the inplace cold DOP and halogenated hydrocarbon tests at design flows on HEPA filters and charcoal adsorber banks shall show g99%

DOP removal and g99% halogenated hydrocarbon removal when tested in accordance with ANSI N510-1975.

2. a.

The tests and sample analysis of Specification 3.7.E.2 shall be performed at least once per operating cycle or once every 18 months, whichever occurs first for standby service or after every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b. The results of laboratory carbon sample analysis shall show p90% radioactive methyl iodide removal at a velocity when tested in accordance with ASTM D3803.

b. Cold DOP testing shall be performed after each complete or partial replacement of the HEPA

'ilter bank or after any structural maintenance on the system housing.

BFN Unit 1 3.7/4.7-19

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4 CONTAINME SYSTEMS MITI G CO TIONS FOR OPERATIO SURVEILLA CE RE UIREME S

3.7.F.

a Containme t Pu e

~Ss tetg 4.7.F.

r ma Co ta nme t Pur e

~Ss ten~

1. The primary containment purge system shall be OPERABLE for PURGING, except as specified in 3.7.F.2.

a.

The results of the in-place cold DOP and halogenated hydrocarbon tests at design flows on HEPA filters and charcoal adsorber banks shall show g 99%

DOP removal and g 99% halogenated hydro-carbon removal when tested in accordance with ANSI N510-1975.

b. The results of laboratory carbon sample analysis shall show g 85% radioactive methyl iodide removal when tested in accordance with ASTM D3803.

I

c. System flow rate shall be shown to be within + 10%

of design flow when tested in accordance with ANSI N510-1975.

2. If the provisions of 3.7.F.l.a, b,

and c cannot be met, the system shall be declared inoperable.

The provisions of Technical Specification 1.C.1 do not apply.

PURGING may con-tinue using the Standby Gas Treatment System.

3. a.

The 18-inch primary contain-ment isolation valves asso-ciated with PURGING may be open during the RUN mode for a 24-hour period after entering the RUN mode and/or for a 24-hour period prior to entering the SHUTDOWN mode.

The OPERABILITY of

l. At least once every 18

months, the pressure drop across the combined HEPA filters and charcoal adsorber banks shall be demonstrated to be less than 8.5 inches of water at system design flow rate (g 10%).

a. The tests and sample analysis of Specifica-tion 3.7.F.1 shall be performed at least once per operating cycle or once every 18 months, whichever occurs first or after 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of

'ystem operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b. Cold DOP testing shall be performed after each complete or partial replacement of the HEPA filter bank or after any structural mainte-nance on the system housing.

c. Halogenated hydrocarbon testing shall be performed after each complete or partial replacement of the charcoal adsorber bank or after any structural maintenance on the system housing.

BFN Unit 1 3.7/4.7-21

~

3.7/4.7 BASES (Cont'd) containment is opened for refueling.

Periodic testing gives sufficient confidence of reactor building integrity and standby gas treatment system performance capability.

The test frequencies are adequate to detect equipment deterioration prior to significant defects, but the tests are not frequent enough to load the filters, thus reducing their reserve capacity too quickly.

That the testing frequency is adequate to detect deterioration was demonstrated by the tests which showed shipboard environment on the US Savannah (ORlg. '~2 ).

Pressure drop across the combined HEPA filters and charcoal adsorbers of less than six inches of water at the system design flow rate will indicate that the filters and adsorbers are not clogged by excessive amounts of foreign matter.

Heater capability, pressure drop and air distribution should be determined at least once per operating cycle to show system performance capability.

The frequency of tests and sample analysis are necessary to show that the HEPA filters and charcoal adsorbers can perform as evaluated.

Tests of the charcoal adsorbers with halogenated hydrocarbon refrigerant shall be performed in accordance with USAEC Report DP-1082.

Iodine removal efficiency tests shall follow ASTM D3803-89.

The charcoal adsorber efficiency test procedures should allow for the removal of one adsorbe tra

, emptying of one bed from the tray, mixing the adsorbent thoroughly and obtaining at least two samples.

Each sample should be at least two inches in diameter and a length equal to the thickness of the bed. If test results are unacceptable, all adsorbent in the system shall be replaced with an adsorbent qualified according to Table 1 of Regulatory Guide 1.52.

The replacement tray for the adsorber tray removed for the test should meet the same adsorbent quality.

Tests of the HEPA filters with DOP aerosol shall be performed in accordance to ANSI N510-1975.

Any HEPA filters found defective shall be replaced with filters qualified pursuant to Regulatory Position C.3.d of Regulatory Guide 1.52.

All elements of the heater should be demonstrated to be functional and OPERABLE during the test of heater capacity.

Operation of each filter train for a minimum of 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months each month will prevent moisture buildup in the filters and adsorber system.

With doors closed and fan in operation, DOP aerosol shall be sprayed externally along the full linear periphery of each respective door to check the gasket seal.

Any detection of DOP in the fan exhaust shall be considered an unacceptable test result and the gaskets repaired and test repeated.

If significant painting, fire or chemical release occurs such that the HEPA filter or charcoal adsorber could become contaminated from the fumes, chemicals or foreign material, the same tests and sample analysis shall be performed as required for operational use.

The determination of significance shall be made by the operator on duty at the time of the incident.

Knowledgeable staff members should be consulted prior to making this determination.

BFN Unit 1 3.7/4.7-33

3.7/4.7 BASES (Cont'd) limited period of time while repairs are being made. If the system cannot be repaired within seven days, the reactor is shutdown and brought to Cold Shutdown within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or refueling operations are terminated.

Pressure drop across the combined HEPA filters and charcoal adsorbers of less than six inches of water at the system design flow rate will indicate that the filters and adsorbers are not clogged by excessive amounts of foreign matter.

Pressure drop should be determined at least once per operating cycle to show system performance capability.

The frequency of tests and sample analysis are necessary to show that the HEPA filters and charcoal adsorbers can perform as evaluated; Tests of the charcoal adsorbers with halogenated hydrocarbon shall be performed in accordance with USAEC Report-1082.

Iodine removal efficiency tests shall follow ASTM D3803-89.

The charcoal adsorber efficiency test procedures should allow for the removal of one adsorber tray, emptying of one bed from the tray, mixing the adsorbent thoroughly and obtaining at least two samples.

Each sample should be at least.two inches in diameter and a length equal to the thickness of the bed. If test results are unacceptable, all adsorbent in the system shall be replaced with an adsorbent qualified according to Table 1 of Regulatory Guide 1.52.

The replacement tray for the adsorber tray removed for the test should meet the same adsorbent quality.

Tests of the HEPA filters with DOP aerosol shall be performed in accordance to ANSI N510-1975.

Any HEPA filters found defective shall be replaced with filters qualified pursuant to Regulatory Position C.3.d of Regulatory Guide 1.52.

Operation of the system for 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months every month will demonstrate OPERABILITY of the filters and adsorber system and remove excessive moisture built up on the adsorber.

If significant painting, fire or chemical release occurs such that the HEPA filter or charcoal adsorber could become contaminated from the fumes, chemicals or foreign materials, the same tests and sample analysis shall be performed as required for operational use.

The determinati.on of significance shall be made by the operator on duty at the time of the incident.

Knowledgeable staff members should be consulted prior to making this determination.

Demonstration of the automatic initiation capability is necessary to assure system performance capability.

3.7.F/4.7.F Prima Containment Pur e

S stem The Primary Containment Purge System is a non-safety related system that is normally isolated and normally not required to be functional during power operation.

The system is designed to provide the preferred exhaust path for purging the primary containment system;

however, the Standby Gas Treatment System can be used to perform the equivalent function.

BFN Unit 1 3.7/4.7-37

~

3.7/4.7 BASES (Cont'd)

When the Primary Containment Purge System is in operation, the exhaust from the primary containment is first processed by a filter train assembly and then channeled through the reactor building roof exhaust system.

The filter train assembly contains a HEPA (high efficiency particulate air) filter, charcoal adsorber, and centrifugal fan.

In-place tests are performed to ensure leak tightness of the filter train assembly of at least 99K and a HEPA efficiency of at least 99K removal of DOP particulates.

Laboratory tests are performed on adsorber carbon samples to ensure an 85K removal efficiency for radioactive methyl iodide.

Tests are performed to ensure that the system is not operating at a flow significantly different from the design flow, which may affect the removal efficiency of the HEPA filters and charcoal adsorbers.

The pressure drop across the combined HEPA filters and charcoal adsorbers is checked once per operating cycle to be less than 8.5 inches of water at the system design flow rate to ensure that the filters and adsorbers are not clogged with excessive amounts of foreign matter.

The above tests are necessary to show that the HEPA filters and charcoal adsorbers can perform as evaluated.

Tests of the charcoal adsorbers with halogenated hydrocarbon shall be performed in accordance with USAEC Report-1082.

Iodine removal efficiency tests shall follow AS'3803-89.

The charcoal adsorber efficiency test procedures should allow for the removal of one adsorber tray, emptying of one bed from the tray, mixing the adsorbent thoroughly and obtaining at least two samples.

Each sample should be at least two inches in diameter and a length equal to the thickness of the bed. If test results are unacceptable, all adsorbent in the system shall be replaced with an adsorbent qualified according to Table 1 of Regulatory Guide 1.52.

The replacement tray for the adsorber tray removed for the test should meet the same adsorbent quality.

Tests of the HEPA filters with DOP aerosol shall be performed in accordance to ANSI N510-1975.

Any HEPA filters found defective shall be replaced with filters qualified pursuant to Regulatory Position C.3.d of Regulatory Guide 1.52.

If significant painting, fire, or chemical release occurs such that the HEPA filter or charcoal adsorber could become contaminated from the fumes, chemicals, or foreign materials, the same tests and sample analysis shall be performed as required for operational use.

The determination of significance shall be made by the operator on duty at the time of the incident.

Knowledgeable staff members should be consulted prior to making this determination.

The primary containment isolation valves associated with the purging of the primary containment are FCV 64-17, 64-18, 64-19, 64-29, 64-30, 64-32, 64-33, and 76-24.

These valves may be open for a 24-hour period after entering the RUN mode and/or for a 24-hour period prior to entering the SHUTDOWN mode.

Closure of these large diameter valves within the 24-hour period is needed to BFN Unit 1 3.7/4.7-38

PROPOSED TECHNICAL SPECIFICATION CHANGE BROWNS FERRY NUCLEAR PLANT UNIT 2 (TVA BFN TECHNICAL SPECIFICATION AMENDMENT 341)

4 CO AI SYS EMS LIMITI G CONDITIONS FOR OPERATION SURVEILLANCE RE UIREME S

3.7.B. Standb Gas Treatment S stem 4.7.B.

Standb Gas Treatment

~Sstem

2. a.

The results of the in-place cold DOP and halogenated hydrocarbon tests at g 10%

design flow on HEPA filters and charcoal adsorber banks shall show g99%

DOP removal and g99% halogenated hydrocarbon removal when tested in accordance with ANSI N510-1975.

2 ~

ao The tests and sample analysis of Specification 3.7.B.2 shall be performed at least once per operating cycle or once every 18 months whichever occurs first for standby service or after every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b. The results of laboratory carbon sample analysis shall show g90% radioactive methyl iodide removal when tested in accordance with ASTM D3803.

b. Cold DOP testing shall be performed after each complete or partial replacement of the HEPA filter bank or after any structural maintenance on the system housing.

c. System shall be shown to operate within F10% design flow.

c ~ Halogenated hydrocarbon testing shall be performed after each complete or partial replacement of the charcoal adsorber bank or after any structural maintenance on the system housing.

BFN Unit 2 3.7/4.7-14

~

4 CO AI SYSTEMS I ITI G CO TIO S

FOR OPERATIO 3.7.E. Control Room Emer enc Ventilation SU LLA C RE UI E S

4.7.E Control Room Emer enc

l. Except as specified in Specification 3.7.E.3 below, both control room emergency pressurization systems shall be OPERABLE at all times when any reactor vessel contains irradiated fuel.

1. At least once every 18 months, the pressure drop across the combined HEPA filters and charcoal adsorber banks shall be demonstrated to to be less than 6 inches of water at system design flow rate (g 10%).

2. a.

The results of the inplace cold DOP and halogenated hydrocarbon tests at design flows on HEPA filters and charcoal adsorber banks shall show g99%

DOP removal and y99% halogenated hydrocarbon removal when tested in accordance with ANSI N510-1975.

2. a.

The tests and sample analysis of Specification 3.7.E.2 shall be performed at least once per operating cycle or once every 18 months, whichever occurs first for standby service or after every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b. The results of laboratory carbon sample analysis shall show g90% radioactive methyl iodide removal at a velocity when tested in accordance with ASTM D3803.

b. Cold DOP testing shall be performed after each complete or partial replacement of the HEPA filter bank or after any structural maintenance on the system housing.

BFN Unit 2 3.7/4.7-19

4 CO AI SYSTEMS LI G

CO TIO S

FOR OPERATIO SURVE LA CE RE UIRE S

3.7.F.

Pr a

Contai e t Pur e

~Ss~te 4.7.F.

Pr a

Co ta t Pur e

~Sat em 1.

The primary containment purge system shall be OPERABLE for PURGING, except as specified in 3.7.F.2.

a.

The results of the in-place cold DOP and halogenated hydrocarbon tests at design flows on HEPA filters and charcoal adsorber banks shall show g 99/

DOP removal and g 99/ halogenated hydro-carbon removal when tested in accordance with ANSI N510-1975.

b.

The results of laboratory carbon sample analysis shall show g 85/ radioactive methyl iodide removal when tested in accordance with ASTM D3803.

c.

System flow rate shall be shown to be within + 10/

of design flow when tested in accordance with ANSI N510-1975.

3 ~

a ~

The 18-inch primary contain-ment isolation valves asso-ciated with PURGING may be open during the RUN mode for a 24-hour period after entering the RUN mode and/or for a 24-hour period prior to entering the SHUTDOWN mode.

The OPERABILITY of

2. If the provisions of 3.7.F.l.a, b,

and c cannot be met, the system shall be declared inoperable.

The provisions of Technical Specification 1.C.1 do not apply.

PURGING may con-tinue using the Standby Gas Treatment System.

1.

At least once every 18

months, the pressure drop across the combined HEPA filters and charcoal adsorber banks shall be demonstrated to be less than 8.5 inches of water at system design flow rate (g lOX).

a.

The tests and sample analysis of Specifica-tion 3.7.F.l shall be performed at least once per operating cycle or once every 18 months, whichever occurs first or after 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following significant painting, fire, or chemical release in any ventilation zone communicating with the system.

b.

Cold DOP testing shall be performed after each complete or partial replacement of the HEPA filter bank or after any structural mainte-nance on the system housing.

c.

Halogenated hydrocarbon testing shall be performed after each complete or partial replacement of the charcoal adsorber bank or after any structural maintenance on the system housing.

BFN Unit 2 3.7/4.7-21

3.7/4.7 BASES (Cont'd) containment is opened for refueling.

Periodic testing gives sufficient confidence of reactor building integrity and standby gas treatment system performance capability.

The test frequencies are adequate to detect equipment deterioration prior to significant defects, but the tests are not frequent enough to load the filters, thus reducing their reserve capacity too quickly.

That the testing frequency is adequate to detect deterioration was demonstrated by the tests which showed no loss of filter efficiency after two years of operation in t

e ru ed shipboard environment on the US Savannah

(~ORRD 2 ).

Pressure drop across the combined HEPA filters and charcoal adsorbers of less than six inches of water at the system design flow rate will indicate that the filters and adsorbers are not clogged by excessive amounts of foreign matter.

Heater capability, pressure drop and air distribution should be determined at least once per operating cycle to show system performance capability.

The frequency of tests and sample analysis are necessary to show that the HEPA filters and charcoal adsorbers can perform as evaluated.

Tests of the charcoal adsorbers with halogenated hydrocarbon refrigerant shall be performed in accordance with USAEC Report DP-1082.

Iodine removal efficiency tests shall follow ASTM 03803-89.

The charcoal adsorber efficiency test procedures should allow for the removal of one adsorber tra

, emptying of one bed from the tray, mixing the adsorbent thoroughly and obtaining at least two samples.

Each sample should be at least two inches in diameter and a length equal to the thickness of the bed. If test results are unacceptable, all adsorbent in the system shall be replaced with an adsorbent qualified according to Table 1

of Regulatory Guide 1.52.