Text

Proposed Tech Specs 3.0 & 4.0 for Emergency Air Treatment Sys
	ML20148F535
Person / Time
Site:	Yankee Rowe
Issue date:	05/20/1975
From:	; Office of Nuclear Reactor Regulation
To:	;
Shared Package
ML20148F531	List: ML20148F528; ML20148F535;
References
	NUDOCS 8011050690
	Download: ML20148F535 (5)
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PHR TECliNICAL SPECIFICATIONS

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3.0 LIMITING CONDITIONS FOR OPERATION 4.0 SURVEILLANCE REQUIREMENTS B.

Emergency Air Treatment Systems B.

Emergency Air Treatment Systems 1.

Except as specified in Specification 1.

At least once per operating cycle,.

Q 3.0.B.4 below, circuits of any the following conditions shall be-co emergency air treatment system and demons tra ted.

c the diesel generators required for p.a operation of such circuits shall a.

Pressure drop across the combined p' 94 be operable at all times when liEPA filters and charcoal adsorber C

the systems may be required.

banks is less than 6 inches of water 01 at system design flow rate.

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C b.

Air distribution is uniform within 20% across llEPA filters end Y

charcoal adsorbers.

2.

a.

The results of the in-place cold DOP 2.

a.

The tests and sample analysis of and halogenated hydrocarbon tests at Specification 3.0.B.2 for the post-design flows on HEPA filters and

. accident purge air treatment system charcoal adscrber banks shall show shall be performed initially and 0' :".

>99% 00P removal and >99% halogenated each refueling outage not to exceed hydrocarbon removal. ~

18 months or after every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of system operation and following b.

The results of laboratory carbon sample significant painting, fire or f) analysis from the post-accident purge chemical release in any ventilation system carbon shall show >90% radio-zone communicating with the system.

active methyl iodide remolial at a velocity within 20 percent of the b.

The tests and sample analysis of post-accident purge air treatment Specification 3.0.B.2 for the fue.1 system design, 0.15 to G.5 mg/m3 handling air treatment system shall inlet methyl iodide concentration, be performed initially and at least

->95% R. H. and >l90 F.

once per year 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 rele23e in any ventilation zone comunicating with the s'ystem.

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E PWR TECHNICAL SPECIFICATIONS - 3.0 LIMITING CONDITIONS FOR OPERATION 4.0' SURVEILLANCE REQUIREMENTS c.

The results of laboratory carbon sample c.

The tests and sample analysis ~

analysis from the fuel handling system of Specification 3.0.B.2 for carbon shall show >90% radioactive the in-containment air treatment -

G methyl iodide removal at a velocity

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system shall be perfomed V

within 20 percent of fuel handling air initially and each refueling treagment system design, 0.05 to 0.15 outage not to exceed 18 months inlet methyl iodide concentration, or af ter every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of systep mg/m

>95% R.H. and >l25 F.

operation and following significa..

painting, fire or chemical release in any ventilation zone commuhicating with-the system.

d.

The results of laboratory carbon sample d.

Cold DOP testing shall be performed -

analysis from the in-containment system -

after each complete or partial carbon shall show >85% radioactive methyl replacement of a llEPA filter bank ~

iodide removal at a velocity within 20 or af ter any structural traintenance percent of in-containment system design, on the system housing.

3 inlet methyl iodide 5 to 15 mg/m concentration, >95% R.H. and >250*F.

O All emergency air treatment system fans e.

Halogenated hydrocarbon testing e.

shall be shown to operate within +10%

shall be performed after each of design flow.

complete or partial replacement g

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of a charcoal adsorber bank or after any structural maintenance on the system housing.

f.

Each circuit shall be operate.d at least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months every month.

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PHR TECl!NICAL SPECIFTCATIONS r

. p 3.0 LIMITING CONDITIONS FOR OPERATION 4.0 SURVEILLA!!CE itEQUIREMEitTS 3.

Tit otal fuel handling standby

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3.

~ ' ally-and at least once treatmen tem bypass f, s 071 not-

year, el handli,

andby exceed 1 percen

-<t e total system air treatment m shall be design flo-e under op dt W old DOP tal co ons.

em bypass of the filter ba Q

o At least once per ope' rating 4.

a.

1 and after the date that one circuit f'

4.

a.

an in-- ntainment air treatment sys is cycle automatic initiation of 6 made or fo to be inoperabl, f any each branch of the emergency "

e reason, reacto eration if permissible air treatment system shall-be ding seven days unless demonstra ted. -

only during the suc c(r sua e operable, such circuit is u'one provided t -

during such se days all b.

At least once per operating

.actijv omponents of the other i ontainment cycle manual operability of the bypass valve for filter

,aW treatment circuit shall be opera q

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cooling-shall be-demonstrated.

b.

From and af ter the date that one circuit of the post-accident purge air treatment system c.

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one circuit of the'i is made or ~ found to be inoperable for any contal nt air trea. nt system.

reason, reactor operation is permissible becomes ino

-the other only during the succeeding thirty days unless circuit si be monstrated O-

such circuit is sooner made operable, provided to ba erable ime J ly and that during such thirty days all active y thereafter.

components of the other post-accident purge p_

air treatment circuit shall be operable.

d.

When one, circuit of the post-accident purge air treatment after the date that the fuel andMrg system becomes inoperable the 5.

a.

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i n to be active components in the other. ~

stenL s r3ade m air treatment inoperable for y-reasolr;-4u handling circuit shall be demonstrated o,pf_caMc.

shall be terminated ime - g to be operable immediately and daily thereafter.

b.

If the conditions for the in-containment or post-accident purge air treatment system cannot be met, operations shall be tenninated innadiately and the reactor shutdown within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

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l PWR TECHNICAL SPECIFICATI0MS_

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Bases

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3.0.B Emergency Air Treatment System The in-containment air treatment system is designed to filter the contai:went building atmosphere during accident conditions.

Both in-containment air treatment systems are designed to automatically start upon

.Q accident signals.

Should one system fail to start, the redundant system is designed to start automatically.

j Each of the two systems has 100 percent capacity.

The fuel handling air treatment system is designed to filter the refueling building atmosphere to the facility vent during refueling conditions.

If the fuel handling air treatment system is on standby, the system is designed to filter the refueling building atmosphere to the facility veht during refueling accident conditions and is automatically started upon @

high radiation signal.

Upon initiation isolation valves in the ventilation system must close to allow air flow through the air treatment system.

If these valves do not close tightly, excessive bypass leakage could occur to negate the usefulness of the HEPA filters and~ charcoal adsorbers to.

reduce potential radiciodine releases to the atmosphere. Therefore, the bypass leakage for the total system has been limited to 1 percent.

High efficiency particulate air (HEPA) filters are installed before the charcoal adsorbers to prevent clogging of the iodine adsorbers for all emergency air treatment systems. The charcoal adsorbers are installed to reduce the potential release of radiciodine to the environment.

The in-place test results should indicate a system leak tightness of less than 1 percent bypass leakage for the charcoal adsorbers ar.d a HEPA efficiency of at least 99 percent removal of D0P particulates.

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The laboratory carbon sample test results should indicate a radioactive methyl iodide removal efficiency.

of at least 90 percent on the fuel handling system sample and at least 85 percent on the in-contain-ment system samples for expected accident conditions.

If the efficiencies of the llEPA filters and charcoal adsorbers are as specified, the resulting doses will be less than the 10 CFR 100 guidelines C~

l for the accidents analyzed.

Operation of the fans significantly different from t.he design flow will l

change the removal efficiency of the HEPA filters and charcoal adsorbers.

i Only one of the two in-containment air treatment systems is needed to cleanup the containment building atmosphere during accident conditions.

If one system is found to be inoperable, there is not an immediate threat to the containment system performance and reactor operation may continue while repairs are being made.

If neither circuit is operable, the plant is brought to a condition where the in-containment air treatment system would not be required.

If the fuel handling air treatment system is found to be inoperable, all fuel handling and fuel movement operations will be teminated until the system is made operable.

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PWR TECHNICAL SPECIFICATIONS Bases 4.0.B Emeroency Air Treabnent Systen Pressure drop across the combined HEPA filters and charcoal adsorbers of less,than 6 inches of rater at the system design flow rate will indicate that the filters and adsorbers are not clogged by excessive amounts.of foreign matter.

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 ANSI Ns10.

- Iodine removal efficiency refrigerant shall be performed in accordance withThe charcoal adsorber efficiency test procedures should tests shall follow RDT Standard M-16-lT.

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 If test results are unacceptable, all adsorbent in and a length equal to the thickness of the bed.

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 Any llEPA filters found defective shall be replaced with filters qualified pursuant to Regulatory Position C.3.d of Regulatory Guide 1.520 Operation of the emergency air treatment system cach month for at least ten (10) hours will demonstrate

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operability of the filters and adsorber system and remove excessive moisture built up on the adsorber.

With the fuel handling standby air treatment system operating, DOP aerosol be adnitted at the refueling,'

Detection of more than 1 percent 00P at the inlet to the facility!

building ventilation system intake.

vent shall be considered an unacceptable test result and the isolation valves repaired to prevent

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bypass leakage and test repeated.

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

Knowledgeable staff members should be cade by the operator on duty at the time of the incident.

be consulted prior to making this determination.

Demonstration of the automatic initiation capability and operability of filter cooling is

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assure system performance capability. system must be testad daily.

This substantiates the availability of the operable system and thus reactor operation can toatinue for a limited period of time.

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ML20148F535

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