View source for 05000285/LER-1994-010, Updates Status of Corrective Action Described in LER 94-010, Rev 1,dtd 950331 Re Mod of CR Air Conditioners at Fcs. Advises That Second CR Air Conditioner Will Be Operational by 950427 Instead of 950415,as Originally Scheduled

{{Adams
| number = ML20082J888
| issue date = 04/13/1995
| title = Updates Status of Corrective Action Described in LER 94-010, Rev 1,dtd 950331 Re Mod of CR Air Conditioners at Fcs. Advises That Second CR Air Conditioner Will Be Operational by 950427 Instead of 950415,as Originally Scheduled
| author name = Patterson T
| author affiliation = OMAHA PUBLIC POWER DISTRICT
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000285
| license number = 
| contact person = 
| document report number = LIC-95-0085, LIC-95-85, NUDOCS 9504180481
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 2
}}
{{LER
| Title = Updates Status of Corrective Action Described in LER 94-010, Rev 1,dtd 950331 Re Mod of CR Air Conditioners at Fcs. Advises That Second CR Air Conditioner Will Be Operational by 950427 Instead of 950415,as Originally Scheduled
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000285
| LER year = 2094
| LER number = 10
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

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Omaha Public Power District                  '
444 South 16th Street Mall                                            ;
Omaha. Nebraska 68102-2247 402/636-2000 April 13,1995 LIC-95-0085 U. S. Nuclear Regulatory Commission                                                                          l l             ATTN: Document Control Desk Mail Station PI-137 Washington, DC 20555

==References:==
: 1.      Docket No. 50-285
: 2.       LER 94-010 Revision 1 from OPPD (T. L. Patterson) to NRC i                                      (Document Control Desk), dated March 31,1995 (LIC-95-0076)

==SUBJECT:==
Revision of a Commitment Related to Control Room Air Conditioning The purpose of this letter is to update the status of a corrective action discussed in Reference 2 concerning the modification of control room air conditioners at Fort Calhoun Station (FCS). On March 31, 1995, OPPD stated, in Reference 2, that:
Modipcation MR-FC-94-020, ' Control Room Air Conditioning Units VA-46A/B Improved Reliability, ' is in progress to address the potential impact ofpostulated post-accident CCW temperatures on the CR/AC units. This modification involves installation of air-cooled condenser units to ensure that the CR/AC units will be able to perform their intendedfimetion in the event of an accident. One modified CR/AC unit will befunctional prior to exceeding an RCS temperature of 300 degrees F at the conclusion of the 1995 refueling outage. The second modiped CR/AC unit will befunctional by April 15,1995.
Subsequently, on April 6,1995, installation and testing was completed on one of the air conditioning units and it was declared operable, as committed. Installation was completed on the second air conditioning unit on April 7,1995. However, a problem was encountered during the post-installation testing of the second air conditioning unit. Therefore, OPPD is modifying its commitment to completing the work on the second control room air conditioner. The second control room air conditioner will be operational by April 27, 1995, instead of April 15, 1995, as originally scheduled. OPPD has carefully reviewed th: FCS plant design basis requirements for redundant control room air conditioning and has 9504180481 950413 PDR    ADOCK 05000285 S                                                                                               w g 45-st 24                               PDR unpbymengtEqua opportunity                              ,

l                                                                                                        l e
U,'S. Nuclear Regulatory Commission                                        -
LIC-95-0085 page 2 l      performed probabilistic risk assessment studies to evaluate the risk associated with the plant    ;
l       operating at oower with one train of control room air conditioning operable and the other        !
train inoperable. This evaluation demonstrated that operation up to fifteen (15) days with one   l control room air conditioner inoperable is acceptable.                                           t If you should have any questions, please contact me.
                                  .                                                                      i Sincerely, s 1i                                                                                    >
        %   , [ Q-                  :
T. L. Patterson Division Manager Nuclear Operations                                                                               ,
      ' TLP/ epm                                                                   ,
c:        LeBoeuf, Lamb, Greene & MacRae L. J. Callan, NRC Regional Administrator, Region IV l                S. D. Bloom, NRC Project Manager R. P. Mullikin, NRC Senior Resident Inspector i
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                            - = ,         -                                                r .-
}}

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