ML20028H095
| ML20028H095 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 10/01/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20028H092 | List: |
| References | |
| NUDOCS 9010090103 | |
| Download: ML20028H095 (3) | |
Text
_ _
L,. gaso
"}'
i#
UNITED STATES -
8 f,
g NUCLEAR REGULATORY COMMISSION E,
,e WASHINGTON, p. c. nosss c
- e..+
' i SAFETY EVALVATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION f
RELATED TO AMENDMENT NO. 165 TO FACILITY OPERATING LICENSE NO. NPF-1 I
i i-PORTLAND GENERAL ELECTRIC COMPANY THE CITY OF EUGENE, OREGON PACIFIC POWER AND LIGHT COMPANY h
TROJAN NUCLEAR PLANT DOCKET NO. 50-344
1.0 INTRODUCTION
By letter dated November 9,1987, as supplemented on February 25, 1988, the
~ '
Portland General Electric Company (PGE) submitted License Change-Application ~-
(LCA 159) to the Trojan: Technical Specifications (TS)._ The proposed TS-changes would revise.the Technical Specification Section 3.9.9,," Containment Ventilation' Isolation. System," (CVIS) by changing the Mode in which the TS would be applicable.
Previously, this Technical Specification was applicable in " MODE 6"; it is to be changed to "During CORE ALTERATIONS or movement'of irradiated fuel within the Containment."
-This change will permit consistency with Technical Specification Section.
3.9.4, " Containment Building Penetrations" which establishes containment-building penetration closure requirements during fuel movement or core alterations, yet ' permits containment building penetrations (e.g., 'airlocks and equipment hatch) to be open during other periods of Mode 6 operations.-
p In addition the change will add two words to the ACTION statement to make H
clear'that only the. containment ventilation penetrations must be closed l{
as a result of CVIS inoperability.
l The changes proposed by the November 9,1987 and February 25, 1988 submittals were noticed in the Federal Register on September 21, 1988 (53 FR 36673).
l, 2.0 DISCUSSION The change to the APPLICABILITY portion of this Technical Specification'is to resolve an inconsistency between Section 3.9.9 (CVIS) and Section 3.9.4 (Containment Building Penetrations) Limiting Conditions for Operation-and to resolve an additional inconsistency between Section 3.9.9 APPLICABILITY and SURVEILLANCE REQUIREMENTS.
TS Section 3.9.9 establishes closure requirements for the containment building penetrations during refueling operations when core alterations or fuel movement is in progress inside the containment. At other times
- in Mode 6, the containment building airlocks, equipment hatch and other penetrations-may be 90ened.
9010090103 901002 PDR ADOCK 0500 44 F
-m m-m
-ee----tww
+-.
y- - --
9'-
T
l w
r t
Prior to the issuance of this amendment, TS 3.9.9 required that each penetration-providing direct access from the containment atmosphere to the
- outside atmosphere be closed while in Mode 6 if the CVIS is inoperable.
Since the containment is normally open in Mode 6 as permitted >y.
TS 3.9.4, it is inconsistent to single out Containment Ventilation dampers for closure if CVIS operability is not maintained.
In addition the Surveillance Requirements of TS 3.9.9 are required to be perform,ed only before starting and while conducting Core Alterations.
No Surveillance Requirements for Mode 6 are specified if fuel movement or Core Alterations are not in progress. The change thus, removes this inconsistency between TS3.9.9ApplicabilityandSurvel11anceRequirements.
3.0 EVALUATION The CVIS functions to isolate containment ventilation penetrations after an accident-has occurred and operability of the CVIS enables automatic isolation of the containment ventilation penetrations. Containment Build-ing penetration closure, while in Mode 6, is relied upon only while Core Alterations or movement of irradiated fuel within the containment is in progress-per TS 3.9.4.
This Technical Specification requires the contain-ment > equipment door be closed, one door in each air lock be closed, and each penetration-from Containment atmosphere to outside atmosphere be either closed.or. capable of being closed by a containment ventilation isolation valve. -These operating'and closure restrictions on containment building penetrations are sbTficient'to restrict radioactive material re-lease from a fuel element rupture while in the refueling mode, Mode 6.
As a result of this change, _the same A)plicability requirements will apply to CVIS 'as apply to containment building penetrations.
The CVIS are required to be operable to support containment building peratration cln;ure requirements. The change to the Action statement is, therefore, an administrative change to-provide clarification that only valves which rely on CVIS for automatic closure are required to be closed if CVIS becomes inoperable.- This change does not-involve a substantive change to the condition of the containment building in~ Mode 6.
The change to the-TS 3.9.9 Action statement is to make it clear that only containment ventilation penetrations must be closed as a result of CVIS inoperability.
We conclude that the licensee's proposed changes to the Trojaa Technical Specifications are acceptable.
4.0 CONTACT WITH STATE OFFICIAL The NRC. staff has notified the Oregon Department of Energy of the proposed issuance of this amendment along with the proposed determination of no significant hazards consideration.
No comments were received.
c
,/y J.
5.0 ENVIRONMENTAL CONSIDERATION
~
This amendment involves a change in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
The staff has determined that the amendment involves no significant increase
.in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there'is no significant increase in individual, or cumulative occupational radiation exposure. The Commission has previously published a proposed finding that the amendment involves no significant hazards consideration and there has been no public comment on such finding. Accordingly, the amendment meets the eli for categorical exclusion set forth in 10 CFR 51.22(c)(gibility criteria 9). Pursuant to 10 CFR 51.22(b), no environmental impact states.nt or environmental assess-ment need be prepared in connection ::ith the issuance of the amendment.
6.0 CONCLUSION
t
.We-have concluded, based on the consicerations discussed above, that (1) there is reasonable assurance that the health and safety of the will not be endangered by operation in the proposed manner, (2) public such activities will be conducted in-cogliance with the Commission's regula -
tions,and.(3)theissuanceoftheamendmentwillnotbeinimicaltothe common defense and security or to the health and safety of the public.
Principal Contributor:
J. Bradfute Dated: October 1,-1990 ti
~)
.