IR 05000341/1987006: Difference between revisions

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{{Adams
{{Adams
| number = ML20245A259
| number = ML20212C616
| issue date = 02/20/1987
| issue date = 02/26/1987
| title = Errata to Insp Rept 50-341/87-06 on 861229-870209.Violations Noted:Failure to Verify Adequacy of Design,Failure to Perform Preoperational Test & Surveillance Test of Hydrogen Recombiner Sys & Plant Entering Operation Condition 2
| title = Forwards Revised Pages to Insp Rept 50-341/87-06 Correcting Violation 341/87-06-03 to Reflect That Only Div II Hydrogen Recombiners Inoperable While Plant Entered Operation Condition 2
| author name = Greenman E
| author name = Norelius C
| author affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
| author affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
| addressee name =  
| addressee name = Sylvia B
| addressee affiliation =  
| addressee affiliation = DETROIT EDISON CO.
| docket = 05000341
| docket = 05000341
| license number =  
| license number =  
| contact person =  
| contact person =  
| document report number = 50-341-87-06, 50-341-87-6, NUDOCS 8703030833
| document report number = NUDOCS 8703030827
| package number = ML20212C621
| package number = ML20212C621
| document type = INSPECTION REPORT, NRC-GENERATED, INSPECTION REPORT, UTILITY, TEXT-INSPECTION & AUDIT & I&E CIRCULARS
| document type = CORRESPONDENCE-LETTERS, NRC TO UTILITY, OUTGOING CORRESPONDENCE
| page count = 2
| page count = 1
}}
}}


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=Text=
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I FEB 2 61987 Docket No. 50-341 g
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The Detroit Edison Company ATTN:
U.S NUCLEAR REGULATORY COPHISSION
B. Ralph Sylvia Group Vice President Nuclear Operations 6400 North Dixie Highway Newport, MI 48166 Gentlemen:
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This refers to our letter dated February 20, 1987, which forwarded Inspection Report No. 50-341/87006.


==REGION III==
Violation 341/87006-03 incorrectly states that both divisions of the hydrogen recombiners were inoperable while the plant entered Operation Condition 2, when in fact,'only Division II was inoperable. Two revised pages to Inspection Report No. 50-341/87006 to correct this error are enclosed with this letter. Please replace the incorrect pages with the revised pages. We regret any inconvenience this may have caused.
I Report No. 50-341/87006(DRP)
Docket No. 50-341 Operating License No. NPF-43 Licensee: Detroit Edison Company 2000 Second Avenue Detroit, MI 48226 Facility Name:
Fermi 2
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Inspection At:
Fermi Site, Newport, Michigan Inspection Conducted: December 29, 1986, through February 9, 1987 Inspectors:
W. G. Rogers M. E. Parker E. & k. k =,,. = a
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Approved By:
G. Greenman, Deputy Director
.2-20-17 Division of Reactor Projects Date Inspection Summary Inspection on December 29, 1986, through February 9, 1987 (Report No. 50-341/87006(DRP))
Areas Inspected: Special unannounced inspection by two resident inspectors of the events surrounding the discovery on December 26, 1986, of both divisions of hydrc a n thermal recombiners being inoperable.


Results: Three violations were identified (failure to verify the adequacy of. design, failure to preoperational test and surveillance test the hydrogen recombiner system utilizing the designed cooling water system, and the plant entered Operation Condition 2 on eleven occasions with Division II of the hydrogen recombiner system inoperable - Paragraph 2).
In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of this letter and the enclosure will be placed in the NRC Public Document Room.


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' We will gladly discuss any questions you have regarding this matter.
ESM o*?ggg PDR


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Sincerely, NdifgiUT tidacd Ir/ C.E. !%:clius*
Charles E. Norelius, Director Division of Reactor Projects Enclosure: Revised Pages cc w/ enclosure:
,
,
r A review of the preoperational test program identified that the thermal recombiner preoperational test, "T4804 Thermal Recombiner System PRET T4804.001," Revision 2, allowed the use of the RHR system or an alternate source if needed.to supply cooling water.
F. H. Sondgeroth, Licensing Engineer P. A. Marquardt, Corporate Legal Department
*
' g DCS/RSB (RIDS)
om Licensing Fee Management Branch
$8'o Resident Inspector, RIII A'08 Ronald Callen, Michigan o
Public Service Commission N:c Harry H. Voight, Esq.


The PRET identified that the RHR keep-fill system was utilized in the preoperational test and that no specific intent was made to utilize the higher RHR pressures to verify proper system operation. The system was operated on several occasions and each time the RHR keep-fill system was used as a source of cooling water.
$8 Nuclear Facilities and go Environmental Monitoring
 
, // p Monroe unty Office of h
Through discussions with personnel there were several reasons that the RHR was not utilized:
j'
(1) RHR pump availability; (2) economic factors, and (3) RHR keep-fill availability.
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g Civil Preparedness
As a result, the hydrogen recombiner system was never tested utilizing the higher RHR pressures. Additionally, functional surveillance Procedure No. 24.409.01, " Post LOCA Thermal Recombiner Functional Test," Step No. 5.3, allowed the RHR keep-fill system to be in service to provide water to the blower and spray cooler during the test. A temporary change to this procedure, effective December 26, 1986, deleted the use of the RHR keep-fill system. This is considered a violation (341/87006-02(DRP))
^
of 10 CFR 50, Appendix B, Criterion XI, Test Control, for failure to preoperational test and surveillance test utilizing the designed cooling water system.
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On January 9, 1987, the licensee identified that while utilizing the RHR system as a source of cooling water, the Division II hydrogen recombiner-system only heated up to 761 F within the required 75 minute time period.
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Technical Specification 4.6.6.1 requires the outlet gas temperature to increase to greater than or equal to 1150 F within 75 minutes. The inability to obtain the required gas temperature was due to excessive internal cooling water seal leakage at the higher RHR pressures. As a result, the Division II hydrogen recombiner system was inoperable and unable to satisfy the surveillance requirements of Technical Specification 4.6.6.1 utilizing the designated source of cooling water.
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Ever since the last seal replacement on August 29, 1985, the licensee has noticed external seal leakage with the Division II recombiner. Therefore, the Division II hydrogen recombiner system was considered inoperable since the seal replacement on August 29, 1985, i
Technical Specifications 3.6.6.1 states that "Two independent drywell and suppression chamber hydrogen recombiner systems shall be OPERABLE in Operational Conditions 1 (power operation) and 2 (startup).
 
Technical Specification 3.0.4 states in part, " Entry into an OPERATIONAL CONDITION or other specified condition shall not be made unless the i
conditions for the Limiting Condition for Operation are met without j
reliance on provisions contained in the ACTION requirements."
 
During the time period from August 29, 1985, to January 8, 1987, the plant entered Operational Condition 2 (Startup) on eleven occasions (October 3, 1985, August 4, 1986, August 11, 1986, August 30, 1986, September 6, 1986, October 3, 1986, October 7, 1986, October 14, 1986, October 19, 1986, October 29, 1986, and December 19,1986) without both divisions of hydrogen recombiner systems operable. This is considered a violation of Technical Specifications 3.0.4 (341/87006-03(DRP)).
 
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Revision as of 06:44, 4 December 2024

Forwards Revised Pages to Insp Rept 50-341/87-06 Correcting Violation 341/87-06-03 to Reflect That Only Div II Hydrogen Recombiners Inoperable While Plant Entered Operation Condition 2
ML20212C616
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 02/26/1987
From: Norelius C
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To: Sylvia B
DETROIT EDISON CO.
Shared Package
ML20212C621 List:
References
NUDOCS 8703030827
Download: ML20212C616 (1)
v • d • e


Text

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DM8 m...

I FEB 2 61987 Docket No. 50-341 g

The Detroit Edison Company ATTN:

B. Ralph Sylvia Group Vice President Nuclear Operations 6400 North Dixie Highway Newport, MI 48166 Gentlemen:

This refers to our letter dated February 20, 1987, which forwarded Inspection Report No. 50-341/87006.

Violation 341/87006-03 incorrectly states that both divisions of the hydrogen recombiners were inoperable while the plant entered Operation Condition 2, when in fact,'only Division II was inoperable. Two revised pages to Inspection Report No. 50-341/87006 to correct this error are enclosed with this letter. Please replace the incorrect pages with the revised pages. We regret any inconvenience this may have caused.

In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of this letter and the enclosure will be placed in the NRC Public Document Room.

' We will gladly discuss any questions you have regarding this matter.

Sincerely, NdifgiUT tidacd Ir/ C.E. !%:clius*

Charles E. Norelius, Director Division of Reactor Projects Enclosure: Revised Pages cc w/ enclosure:

,

F. H. Sondgeroth, Licensing Engineer P. A. Marquardt, Corporate Legal Department

' g DCS/RSB (RIDS)

om Licensing Fee Management Branch

$8'o Resident Inspector, RIII A'08 Ronald Callen, Michigan o

Public Service Commission N:c Harry H. Voight, Esq.

$8 Nuclear Facilities and go Environmental Monitoring

, // p Monroe unty Office of h

j'

Jf' 6/

g Civil Preparedness

^

j SIII RIII RIII RIn b \\

02wg9 9!k;er

!

Tman QO ke/

sa me

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