ML20150B038
| ML20150B038 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 03/07/1988 |
| From: | TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML20150B035 | List: |
| References | |
| NUDOCS 8803160138 | |
| Download: ML20150B038 (2) | |
Text
l
.D.ocket No. 50-346 l
License No NPF-3 Serial No. 1474 l 'f7AIN)ENT SYSTT)fS CC CONTAIN)ENT Lt.AKAG1 LIMITING CONDITION FOR OPERATION 3.6.1.2 Containment leakage rates shall be limited to:
An overall integrated leakage rate of 1 L 0.50 percent by a.
weight of the containment air per 24 hourl,at P,, 38 peig, b.
A combined leakage rate of ( 0.60 L valves subject to Type 3 ani C testI,for all penetrations and when pressurized to P,.
A combined leakage rate of 5 0.015 L'ry containment bypass c.
for all penetrations identified in Table 3.6 1 as secends leakage paths, when pressurized to P,.
d.
A single penetration leskate rate of 5 0.15 L for the containment purgeandexhaustisolationvalvespecialtest.
APPLICABI11TT: MODES 1, 2, 3 and 4.
)
CTION:
l
)
With either (a) the measured overall integrated containment a.
leakage rate exceeding 0.75 L leakage rate for all penetration (b) with the eensured combined s and valves subject to Type 3 aad C tests exceeding 0.60 L,L, or (c) with the combined bypass leakage rate exceeding 0.015 restore the Icakage rete (s) to within the limit (s) prior to i$c,reasing the Reactor Coolant Systes temperature above 200'T.
b.
With a single containment purge and exhaust isolation valve penetration having leakage rate exceeding 0.15 L restere the leakage rate to within limits in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be In at least NOT STANDBT within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHVIV0WN within the followins 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILIANCE REQUIREMENTS 4.6.1.2 The contalarant leakage rates sna11 be demonstrated at the following test schedule and shall be determined in conformance with the critei*a specified in Appendix J of 10 CTR $0 using the methods and 3
provisions of ANSU N4$.4 - 1972:
Three Type A tests (Overall Integrated Containment Leakage Rate) a.
shall be conducted at 40 + 10 eenth intervals durip.hutJoAnt P, g:::_ jtig sd3tc h each30Jgat_tetyice,Pgrio(,_f. e thirt-trat 5.
- n il-1-be-cdcted-dering-thi:_shn;; iv. ih. 10 yes: ple: i:n:-::: i::;;;4&eas i,
U DAVIS-BESSE UNIT 1 3/4 6-2 Amendment No. 90 8803160138 880307 PDR ADOCK 05000346 P
'docketNo.50-346 License N. NPF-3 9
Serial No.1474 3/4.6 CONTAINMENT SYSTEMS 8ASES 3/4.6.1 PRIMARY CONTAINMENT 3/4.6.1.1 CO,NTAIMENT INTEGRITY Primary CONTAl*ENT INTEGRITY ensures that the release of radioactive materials frun the containment atmosphere will be restricted to those leakage paths and associated leak rates assumed in the stlety analyses.
This restriction, it: conjunction with the leakafle rate limitStion, will limit the site boundary radiation doses to with n the limits of 10 CFR 100 during accident conditions.
3/4.6.1.2 CONTAINMENT LEAKAGE Yhe limitations on containment leakage rates ensure that the total containment leakage volume will not exceed the value assurd in the safety analyses at the peak accident pressure of 38 psig P. As an added conservatism, the measured overall integrated leakage,ra'te is further limited to < 0.75 L during performance of the periodic tests to account for possble deg,dation of the containment leakage barriers ra between leakage tests.
m e-testir,g for :ss.cir,9 set ret &E
(
m ent Mu, The special test for the containment purge and exhaust isolation valves is intended to detect gross degradation of seals on the valve seats.
The special test is performed in addition to tN Aeoendix J requirements.
3/4.6.1.3 CONTAINNT AIR LOCKS -
The limitations on closure and leak rate for the containment sir locks are required to meet the resti'ictions on C0"\\tWENT INTEGRITY and contairunent leek rate.
Surveillance testing of t... air lock seals pr' vide assurance that the overall air lock leakage will not become d
(C',s e to seal damage during the intervals between air lock y
V shtA_
The wrv<illau, tesu$ ( tocF950,
' wi th de require,,,,ds {cr measuWn lokay rates se consis4<d npenJ6.T stk N hII wi.ig o
7 c u,,9&s. % 4L ra ted cQ each Tp A +csting set w,,a wc4 b<
jo.- 4, t o q<avo f 6, vn s.
p a r y ecaduc tea when the ta d a skJJowa i
t
( in se rvit, inge &ns, e o p. A.\\ re a.L. e is is comiJ<r<d pu,ve n bq the I L R T, had in a cc rdan<, Jtb license repire. b wL,.
i DAVIS-BESSE. UNIT 1 B 3/4 6-1 Amendment No. 90
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