ML20040A277
| ML20040A277 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/28/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8201200682 | |
| Download: ML20040A277 (4) | |
Text
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i DEC 2 81981 I
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fir. h. L. Pdrris h m",1lie N
j tianager of Power
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Lhottonuoya, Tennessee 374U1 k
j Uedr ar. Parris:
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dubject: iloui tication to besuoyah unit 2 Stortup Test Prograni 1
Your letter of Hovember 3,1961, requested deleting startup test 50-9.5 3
hou broup urup and Plant Trip, for Sequoyan Unit 2.
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l bdSea on the additional infori.1dtjon provided in your letter of Decei.1 Der l
9, 1961 and statf discussions on tais matter, your request is denied.
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Altneugh this test was performed on Unit I and the syste as are identical, j
we have detcrained tnat tite test ob,3cctives connot be fully satisfied unless j
the test is performed on Unit 2.
Our reosons are os follows 1
j 1.
Contirmation todt the negative rate trip circuit trips properly on Unit 2 is best detenained by actual testing at power.
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d.
Udtd f rord this test provide Vdluable infonnation on the response 1
of the systec s to plant trip Defore perforaing the turbine trip j
and reactor trip frou 100 percent poier.
Lach unit could nave j
response characteristics that are significantly different fros
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eacn utner.
It see.as prudent to us to be.ve tnis information j
prior to a full power plaint trip.
1 Our findings were discussed with the dkL negion Il end they concur in 1
denying your request for deleting the test. Also, f urther guidance on the
]
stdrtup test wili ac forwaruea to you in a separ te ietter.
3 2
Sincerely, 1
Original signed by
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Robert L Tedopp Robert L. Tedesco, Assistant Director 8201200602 Bigjjg for Licensing j
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DU-add I6r. n. u. Parris fianager of Power Tennessee valley authoritj SLOo Chestnut Street, fouer 11 Cna ttanooga, Terinessee 3 7.iu l
Dear ;ir. Parris:
SuoJec t: iiodification to Sequojan Uni t 2 tartup Test ProJraa a
four letter or soveover J, 1901, re@es ted Mleting startup test 5U->.S
.ced uroup uru,, anu plant Trip, for acquajah Unit 2.
vased on the intorn.ation provieed and staff uiscussion on tais...atter, jour request is cenied.,sltouagh cnis test nos pertorted on Unit I toe systens are 1eentical, ne nave deter.oined tuat the test objectives and casuio t L.e 't ully sati s f ied unless tue test is porton.eu on Unit 2.
Our FCaSo'Is dre os t ollo.M:
1.
Loatimation tnat tr.e negative rate trip circui t trips properly on unit c is oest deter.ained Dj actuisi testing at po;.er.
4.
uata t rui.; thi s test proviue valuaule intori:dtion on the response of the sjste..is tu plant trip.sciure pertor:aing tile turDine trip and reac tcr trip t ru.3 luu percent power.
Lacil utilt could nave response cnaracteristics tnat are sijni ficantly dif ferent fro :
each atner.
It scess pruuent to us to nave Enis intoraation prior to a tull pc..er plant trip.
uur findings.rere uiscussed wito tue n.as i.ejion 11 inspector and thej cuncLr in denying juar request for deletinj the test.
Sincerely, r.obert L. Iedesco, nssistant Director CP(
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for Licensina AQ/
uivi>1on of Licensin a
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50-328 hr. it. u. Parris
- ianager of Fwer Tennessee Vallcy Authority SUUn Lt.estnut Street, Iwer 11 Chattanooga, Tennessee 37401
Dear Hr. Parris:
hubject: hodification to Sequoyah Unit 2 Startup Test Prograa Your letter of hovenber J, IWI, requested deleting startup test SU-9.5 noo Group brup and Plant Trip, for Sequoyan Unit 2.
Based on the inforstation proviced and staff discussion on this uatter, your ret;uest is denied. Althougn this test was perforued ca Unit I and the systenes are identical, We have determined that the test Objectives connot be fully satisfico unless the test is pertameu on Unit 2.
Our reasons are as follows:
1.
contirnation that the nesative rate trip circuit trips properly on Unit 2 is best deteruined by actual testing at pwer.
2.
Data froat this test provide valuable information on the respon:,e of 'the systens to plant trip before ;,crforming the turbine trip and reactor trip frou 100 percent power. Eacu unit could have response characteristics that are significantly different from each other.
It seeus prucent to us to Sve this infor...ation prior to a full poner plant trip.
Our t1ndings were discussec with the bequoyah resident inspi.ctor wae concurs in denying your request for deletin] the test.
dincerely, hcbert L. Iedesco, nssistunt Director for Licensing l
Division cf Licensing j
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RTedesco SHanauer n r. it. (2. Parris RVollmer aanager ut Power JKramer Tennessee Valley authority RMattson auun Chestnut Street, Tower 11 OELD Lnattanooga, Tennessee 37401 OIE (3)
Dear Mr. Parris:
subjec t: Modification to Sequoyah unit 2 Startup Test Pro 3rau Your letter of liovea.ber 3,1981 requested deleting startup test SU
.5 J
nod broup brop anu Plant T rip, for Sequoyan Unit 2.
based on the information provided and staft discussion on this matter, your request is denied. Altncugh this test was perforoea on Unit I ano the systeas are identical, we have deteruined that the test objectives Cdunot be fully satisfieG Unless tne test is perfon..ed on Unit 2.
dur reasons are as follos.s:
Confirmation tnat t.ie nui ative rate trip circuit trips properly 1.
j on Unit 2 is best cetenained by actual testing at power.
2.
uati trua tnis test provices valuable inforuation on tue response of the systems to plant trip before perforiuing the turbine trip
- md reactor trip froa 100 percent power.
Each unit could have response characteristics tnat are significantly different tro..;
eacn other.
It seems precent to us to have tnis inforaation prior to a full poser plant trip.
Our findinjs were discus:,eu with tne bequoyan it.1,u;pection office and. they concur in denying ;, cur rt. quest for deleting the test.
Sincerely, hooert L. leoesco, Assistant Director for Licensing Division or Licensing cc: il sequoyan Rosieent Office ut n I
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