ML11307A157: Difference between revisions
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| number = ML11307A157 | | number = ML11307A157 | ||
| issue date = 01/31/2011 | | issue date = 01/31/2011 | ||
| title = | | title = Lr - FW: Seabrook RAI follow-up TRP-3 | ||
| author name = | | author name = | ||
| author affiliation = NRC/NRR | | author affiliation = NRC/NRR | ||
| Line 15: | Line 15: | ||
=Text= | =Text= | ||
{{#Wiki_filter: | {{#Wiki_filter:SeabrookNPEm Resource From: Plasse, Richard Sent: Monday, January 31, 2011 9:37 AM To: Cliche, Richard | ||
==Subject:== | ==Subject:== | ||
FW: Seabrook RAI follow-up TRP-3 Attachments: | FW: Seabrook RAI follow-up TRP-3 Attachments: SBK_AMP_RAI_2_1_3-2_Followup_-_Rx_Head_Studs_(TRP_3)_Pan_SMin_1-27-2011 | ||
SBK_AMP_RAI_2_1_3-2_Followup_- | _for_BC_-oyee SMin (Clean).doc Importance: High Draft rai 1 | ||
_for_BC_-oyee SMin (Clean).doc Importance: | |||
High Draft rai Hearing Identifier: | Hearing Identifier: Seabrook_License_Renewal_NonPublic Email Number: 2244 Mail Envelope Properties (Richard.Plasse@nrc.gov20110131093600) | ||
==Subject:== | ==Subject:== | ||
FW: Seabrook RAI follow-up TRP-3 | FW: Seabrook RAI follow-up TRP-3 Sent Date: 1/31/2011 9:36:53 AM Received Date: 1/31/2011 9:36:00 AM From: Plasse, Richard Created By: Richard.Plasse@nrc.gov Recipients: | ||
Tracking Status: None Post Office: | "Cliche, Richard" <Richard.Cliche@fpl.com> | ||
Tracking Status: None Post Office: | |||
Files Size Date & Time MESSAGE 11 1/31/2011 9:36:00 AM SBK_AMP_RAI_2_1_3-2_Followup_-_Rx_Head_Studs_(TRP_3)_Pan_SMin_1-27-2011_for_BC_-oyee SMin (Clean).doc 34374 Options Priority: High Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: | |||
Recipients Received: | |||
DRAFT Seabrook Reactor Head Closure Studs Program RAI B.2.1.3-2 Follow-up | |||
DRAFT Seabrook Reactor Head Closure Studs Program | |||
RAI B.2.1.3-2 Follow-up | |||
===Background=== | ===Background=== | ||
RAI B.2.1.3-2, in part, requested the applicant to clarify whether the lubricant, which is used for the installation and removal of the reactor head closure studs, is stable at the operating temperatures of the reactor head closure studs. In its response dated January 13, 2011, the applicant stated that the lubricant (WD-40) has an operating temperature range from -10°F to 200°F in comparison with the operating temperature of the reactor head closure studs which is estimated to approach 500°F. The applicant also stated that according to the manufacturer of the lubricant, when the lubricant is exposed to the reactor vessel metal temperature at operating condition, it would carbonize. | |||
RAI B.2.1.3-2, in part, requested the applicant to clarify whether the lubricant, which is used for the installation and removal of the reactor head closure studs, is stable at the operating temperatures of the reactor head closure studs. In its response dated January 13, 2011, the applicant stated that the lubricant (WD-40) has an operating temperature range from -10°F to 200°F in comparison with the operating temperature of the reactor head closure studs which is estimated to approach 500°F. The applicant also stated that according to the manufacturer of the lubricant, when the lubricant is exposed to the reactor vessel metal temperature at operating condition, it would carbonize. | |||
RG 1.65, which is referenced in the GALL Report, addresses the guidance that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting. | RG 1.65, which is referenced in the GALL Report, addresses the guidance that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting. | ||
Issue | Issue The staff noted that the operating temperature range of the applicants lubricant (-10 to 200 °F) is significantly lower than the operating temperature of the reactor head closure studs that is estimated to approach 500 °F by the applicant. The staff also noted that the lubricant carbonizes at the operating temperature of the closure studs. Therefore, the applicants use of the lubricant is not consistent with the guidance in RG 1.65 that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting. | ||
°F) is significantly lower than the operating temperature of the reactor head closure studs that is estimated to approach 500 | In addition, the staff finds a concern that the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads degrade the lubrication process of the bolting such that the removal operation of the studs may cause sticking, galling or thread damage of the reactor head closure bolting. | ||
°F by the applicant. The staff also noted that the lubricant carbonizes at the operating temperature of the closure studs. Therefore, the | Request | ||
: 1. Justify why the use of the lubricant (WD-40), the operating temperature of which is significantly lower than that of the reactor head closure studs, is consistent with the guidance in RG 1.65 and GALL Report that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting, as addressed in LRA Section B.2.1.3 stating the applicants implementation of the guidance in RG 1.65 for lubricants. | |||
are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting. | In addition, justify the use of the lubricant (WD-40), which has an operating temperature range from -10°F to 200°F, on the reactor head closure studs, which has an operating temperature that is estimated to approach 500°F. If a justification for the use of this lubricant cannot be provided, commit to the use of a lubricant that will remain stable at operating temperatures of the reactor head closure stud bolting. | ||
In addition, the staff finds a concern that the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads degrade the lubrication process of the bolting such that the removal operation of the studs may cause sticking, galling or thread damage of the reactor head closure bolting. | |||
Request | |||
: 1. Justify why the use of the lubricant (WD-40), the operating temperature of which is significantly lower than that of the reactor head closure studs, is consistent with the guidance in RG 1.65 and GALL Report that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting, as addressed in LRA Section B.2.1.3 stating the | |||
in RG 1.65 for lubricants. | |||
In addition, justify the use of the lubricant (WD-40), which has an operating temperature range from -10°F to 200°F, on the reactor head closure studs, which has an operating temperature that is estimated to approach 500°F. If a justification for the use of this lubricant cannot be provided, commit to the use of a lubricant that will remain stable at operating temperatures of the reactor head closure stud bolting. | |||
DRAFT 2. Justify why the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads do not cause sticking, galling or thread damage of the studs and flange threads. As part of the justification, clarify whether the | DRAFT | ||
: 2. Justify why the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads do not cause sticking, galling or thread damage of the studs and flange threads. As part of the justification, clarify whether the applicants operating experience is in agreement with the justification.}} | |||
Latest revision as of 00:48, 6 December 2019
| ML11307A157 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 01/31/2011 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| Download: ML11307A157 (4) | |
Text
SeabrookNPEm Resource From: Plasse, Richard Sent: Monday, January 31, 2011 9:37 AM To: Cliche, Richard
Subject:
FW: Seabrook RAI follow-up TRP-3 Attachments: SBK_AMP_RAI_2_1_3-2_Followup_-_Rx_Head_Studs_(TRP_3)_Pan_SMin_1-27-2011
_for_BC_-oyee SMin (Clean).doc Importance: High Draft rai 1
Hearing Identifier: Seabrook_License_Renewal_NonPublic Email Number: 2244 Mail Envelope Properties (Richard.Plasse@nrc.gov20110131093600)
Subject:
FW: Seabrook RAI follow-up TRP-3 Sent Date: 1/31/2011 9:36:53 AM Received Date: 1/31/2011 9:36:00 AM From: Plasse, Richard Created By: Richard.Plasse@nrc.gov Recipients:
"Cliche, Richard" <Richard.Cliche@fpl.com>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 11 1/31/2011 9:36:00 AM SBK_AMP_RAI_2_1_3-2_Followup_-_Rx_Head_Studs_(TRP_3)_Pan_SMin_1-27-2011_for_BC_-oyee SMin (Clean).doc 34374 Options Priority: High Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received:
DRAFT Seabrook Reactor Head Closure Studs Program RAI B.2.1.3-2 Follow-up
Background
RAI B.2.1.3-2, in part, requested the applicant to clarify whether the lubricant, which is used for the installation and removal of the reactor head closure studs, is stable at the operating temperatures of the reactor head closure studs. In its response dated January 13, 2011, the applicant stated that the lubricant (WD-40) has an operating temperature range from -10°F to 200°F in comparison with the operating temperature of the reactor head closure studs which is estimated to approach 500°F. The applicant also stated that according to the manufacturer of the lubricant, when the lubricant is exposed to the reactor vessel metal temperature at operating condition, it would carbonize.
RG 1.65, which is referenced in the GALL Report, addresses the guidance that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting.
Issue The staff noted that the operating temperature range of the applicants lubricant (-10 to 200 °F) is significantly lower than the operating temperature of the reactor head closure studs that is estimated to approach 500 °F by the applicant. The staff also noted that the lubricant carbonizes at the operating temperature of the closure studs. Therefore, the applicants use of the lubricant is not consistent with the guidance in RG 1.65 that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting.
In addition, the staff finds a concern that the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads degrade the lubrication process of the bolting such that the removal operation of the studs may cause sticking, galling or thread damage of the reactor head closure bolting.
Request
- 1. Justify why the use of the lubricant (WD-40), the operating temperature of which is significantly lower than that of the reactor head closure studs, is consistent with the guidance in RG 1.65 and GALL Report that lubricants for the stud bolting are permissible provided they are stable at operating temperatures of the reactor head closure stud bolting, as addressed in LRA Section B.2.1.3 stating the applicants implementation of the guidance in RG 1.65 for lubricants.
In addition, justify the use of the lubricant (WD-40), which has an operating temperature range from -10°F to 200°F, on the reactor head closure studs, which has an operating temperature that is estimated to approach 500°F. If a justification for the use of this lubricant cannot be provided, commit to the use of a lubricant that will remain stable at operating temperatures of the reactor head closure stud bolting.
DRAFT
- 2. Justify why the carbonization of the lubricant and accumulation of carbonization by-products on the studs and flange threads do not cause sticking, galling or thread damage of the studs and flange threads. As part of the justification, clarify whether the applicants operating experience is in agreement with the justification.