ML22240A105

Changes Related to AP1000 Gts Subsection 3.9.4, Refueling Cavity Water Level

ML22240A105
Person / Time
Issue date:	05/27/2015
From:	NRC/NRR/DSS/STSB
To:
Craig Harbuck NRR/DSS 301-415-3140
Shared Package
ML22240A001	List: ML22240A003 ML22240A005 ML22240A006 ML22240A007 ML22240A008 ML22240A010 ML22240A011 ML22240A012 ML22240A013 ML22240A014 ML22240A015 ML22240A016 ML22240A017 ML22240A018 ML22240A019 ML22240A020 ML22240A021 ML22240A022 ML22240A023 ML22240A024 ML22240A026 ML22240A027 ML22240A028 ML22240A030 ML22240A031 ML22240A033 ML22240A035 ML22240A036 ML22240A037 ML22240A038 ML22240A040 ML22240A041 ML22240A042 ML22240A043 ML22240A044 ML22240A045 ML22240A046 ML22240A047 ML22240A049 ML22240A050 ML22240A051 ML22240A052 ML22240A053 ML22240A054 ML22240A056 ML22240A057 ML22240A058 ML22240A059 ML22240A060 ML22240A061 ... further results
References
Download: ML22240A105 (21)

Text

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 1 Advanced Passive 1000 (AP1000)

Generic Technical Specification Traveler (GTST)

Title:

Revision of AP1000 GTS Subsection 3.9.4, Refueling Cavity Water Level I.

Technical Specifications Task Force (TSTF) Travelers, Approved Since Revision 2 of STS NUREG-1431, and Used to Develop this GTST TSTF Number and

Title:

None STS NUREGs Affected:

Not applicable NRC Approval Date:

Not applicable TSTF Classification:

Not applicable

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 2 II.

Reference Combined License (RCOL) Standard Departures (Std. Dep.), RCOL COL Items, and RCOL Plant-Specific Technical Specifications (PTS) Changes Used to Develop this GTST RCOL Std. Dep. Number and

Title:

None RCOL COL Item Number and

Title:

Not applicable RCOL PTS Change Number and

Title:

The Vogtle Electric Generating Plant Units 3 and 4 License Amendment Request (VEGP LAR) proposed the following changes to the initial version of the PTS (referred to as the current TS by the VEGP LAR).

These changes include Administrative Changes (A) and Less Restrictive Changes (L) and are addressed in enumerated discussions of change (DOCs). These changes are discussed in Sections VI and VII of this GTST.

DOC A038:

Editorial/clarification change DOC L05:

Elimination of LCO 3.0.8

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 3 III.

Comments on Relations Among TSTFs, RCOL Std. Dep., RCOL COL Items, and RCOL PTS Changes This section discusses the considered changes that are: (1) applicable to operating reactor designs, but not to the AP1000 design; (2) already incorporated in the GTS; or (3) superseded by another change.

This subsection with its title is equivalent to Subsection 3.9.7 in WOG STS Rev. 4.

DOC A038 makes a minor editorial change for LCO SR 3.9.4.1 by eliminating the word that under Surveillance.

DOC L05 eliminates LCO 3.0.8 from LCO 3.9.4 Actions and from Bases 3.9.4 Actions.

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 4 IV.

Additional Changes Proposed as Part of this GTST (modifications proposed by NRC staff and/or clear editorial changes or deviations identified by preparer of GTST)

APOG Recommended Changes to Improve Bases 3.9.4 Insert Chapter 15, Accident Analyses as Reference 1 in the list of references (APOG #499) and thus renumber the other references as Ref. 2 and Ref. 3.

Revise the reference numbers in Bases Background (APOG #495), Applicable Safety Analyses (APOG #496) and SR 3.9.4.1 Surveillance Requirements (APOG #498).

Delete the phrase refueling canal from Bases-Background. (APOG #495)

Change the phrase in containment to within containment in Bases-Applicability. (APOG

1. 497)

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 5 V.

Applicability Affected Generic Technical Specifications and Bases:

Section 3.9.4, Refueling Cavity Water Level Changes to the Generic Technical Specifications and Bases:

Eliminate in SR 3.9.4.1 Surveillance the word that from the phrase Verify that refueling cavity water level is where the word that is underlined. (DOC A038)

Eliminate LCO 3.0.8 from LCO 3.9.4 Actions and from Bases 3.9.4 Actions. (DOC L05)

Insert Chapter 15, Accident Analyses as Reference 1 in the list of references (APOG #499) and renumber the other references as Ref. 2 and Ref. 3.

Revise the reference numbers in Bases Background (APOG #495), Applicable Safety Analyses (APOG #496) and SR 3.9.4.1 Surveillance Requirements (APOG #498).

Delete the phrase refueling canal from Bases-Background. (APOG #495)

Change the phrase in containment to within containment in Bases-Applicability. (APOG

1. 497)

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 6 VI.

Traveler Information Description of TSTF changes:

Not applicable Rationale for TSTF changes:

Not applicable Description of changes in RCOL Std. Dep., RCOL COL Item(s), and RCOL PTS Changes:

Administrative Changes (A):

DOC A038:

In SR 3.9.4.1, the Surveillance is revised by eliminating the word that from the phrase Verify that refueling cavity water level is where the word that is underlined.

Less Restrictive Changes (L):

DOC L05:

The reference to LCO 3.0.8 is eliminated in TS LCO Actions Note and Bases Actions for this subsection. The changes are highlighted later in the Markup of this subsection at the end of this GTST.

Rationale for changes in RCOL Std. Dep., RCOL COL Item(s), and RCOL PTS Changes:

According to DOC A038, deletion of 'that' from Surveillances is consistent with the guidance provided in TSTF-GG-05-01, subsection 3.1.1.g, that states: Avoid the use of 'that' in the Specifications if the statement is clear without it. Deleting 'that' from the current SRs does not reduce the clarity of the SRs.

In reference to the elimination of LCO 3.0.8, DOC L05 indicates that current TS LCO 3.0.8 applies in Modes 5 and 6 when the associated Actions are not met or an associated Action is not provided. In some cases, LCO 3.0.8 is explicitly excluded from applying by way of a Note.

In conjunction with the change to eliminate LCO 3.0.8, these Notes are no longer necessary and are administratively eliminated. VEGP TSU DOC concludes that, removing LCO 3.0.8 (and references to it) will not adversely impact public health and safety.

Accordingly, the changes made by DOC A038 and DOC L05 are acceptable. Furthermore, these changes are consistent with WOG STS 3.9.7, Rev. 4 (which is equivalent to GTS 3.9.4).

Therefore, these changes are implemented by this GTST in AP1000 STS 3.9.4, Rev. 0.

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 7 Description of additional changes proposed by NRC staff/preparer of GTST:

None Rationale for additional changes proposed by NRC staff/preparer of GTST:

Not applicable

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 8 VII. GTST Safety Evaluation Technical Analysis:

Technical discussion for the changes proposed by DOC A038 and DOC L05 are covered in the section VI of this GTST under Rationale for changes in RCOL Std. Dep., RCOL COL Item(s),

and RCOL PTS Changes.

References to Previous NRC Safety Evaluation Reports (SERs):

None

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 9 VIII. Review Information Evaluator Comments:

None Joseph C. Braun Argonne National Laboratory 630-252-5574 joebraun@anl.gov E. Danial Doss Argonne National Laboratory 630-252-5967 doss@anl.gov Review Information:

Availability for public review and comment on Revision 0 of this traveler approved by NRC staff on 4/23/2014.

APOG Comments (Ref. 7) and Resolutions:

1. (Internal #495, #496, #498, #499) 3.9.4, Bases: APOG recommends (# 499) inserting Chapter 15, Accident Analyses as Reference 1 in the list of references and thus renumbering the other references as Ref. 2 and Ref. 3. Accordingly, APOG recommends revising the reference numbers in Bases Background (#495), Applicable Safety Analyses

(#496) and SR 3.9.4.1 Surveillance Requirements (#498).

Throughout the Bases, references to Sections and Chapters of the FSAR do not include the FSAR clarifier. Since these Section and Chapter references are to an external document, it is appropriate (APOG #3) to include the FSAR modifier. This is resolved by adding the FSAR modifier as appropriate.

2. (Internal #495) 3.9.4, Bases

Background:

APOG recommends deleting the phrase refueling canal. APOG comments that this is an editorial change that provides improved clarity, consistency, and operator usability. This change is made as recommended to improve the Bases.

3. (Internal #497) 3.9.4, Bases Applicability: APOG recommends changing the phrase in containment to within containment. APOG comments that this is an editorial change that provides improved clarity, consistency, and operator usability. This change is made as recommended to improve the Bases.

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 10 NRC Final Approval Date: 05/27/2015 NRC

Contact:

Derek Scully U.S. Nuclear Regulatory Commission 301-415-6972 Derek.Scully@nrc.gov

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 11 IX.

Evaluator Comments for Consideration in Finalizing Technical Specifications and Bases None

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 12 X.

References Used in GTST

1.

AP1000 DCD, Revision 19, Section 16, Technical Specifications, June 2011 (ML11171A500).

2.

Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 3 and 4, Technical Specifications Upgrade License Amendment Request, February 24, 2011 (ML12065A057).

3.

NRC Safety Evaluation (SE) for Amendment No. 13 to Combined License (COL) No. NPF-91 for Vogtle Electric Generating Plant (VEGP) Unit 3, and Amendment No. 13 to COL No.

NPF-92 for VEGP Unit 4, September 9, 2013, ADAMS Package Accession No. ML13238A337, which contains:

ML13238A355 Cover Letter - Issuance of License Amendment No. 13 for Vogtle Units 3 and 4 (LAR 12-002).

ML13238A359 - Amendment No. 13 to COL No. NPF-91 ML13239A256 - Amendment No. 13 to COL No. NPF-92 ML13239A284 Enclosure 3 - Revised plant-specific TS pages (Attachment to Amendment No. 13)

ML13239A287 - Safety Evaluation (SE), and Attachment 1 - Acronyms ML13239A288 SE Attachment 2 - Table A - Administrative Changes ML13239A319 SE Attachment 3 - Table M - More Restrictive Changes ML13239A333 SE Attachment 4 - Table R - Relocated Specifications ML13239A331 SE Attachment 5 - Table D - Detail Removed Changes ML13239A316 SE Attachment 6 - Table L - Less Restrictive Changes The following documents were subsequently issued to correct an administrative error in :

ML13277A616 Letter - Correction To The Attachment (Replacement Pages) - Vogtle Electric Generating Plant Units 3 and 4-Issuance of Amendment Re:

Technical Specifications Upgrade (LAR 12-002) (TAC No. RP9402)

ML13277A637 - Revised plant-specific TS pages (Attachment to Amendment No. 13) (corrected)

4.

TSTF-GG-05-01, Writer's Guide for Plant-Specific Improved Technical Specifications, June 2005.

5.

RAI Letter No. 01 Related to License Amendment Request (LAR)12-002 for the Vogtle Electric Generating Plant Units 3 and 4 Combined Licenses, September 7, 2012 (ML12251A355).

6.

Southern Nuclear Operating Company, Vogtle Electric Generating Plant, Units 3 and 4, Response to Request for Additional Information Letter No. 01 Related to License Amendment Request LAR-12-002, ND-12-2015, October 04, 2012 (ML12286A363 and ML12286A360).

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 13

7.

APOG-2014-008, APOG (AP1000 Utilities) Comments on AP1000 Standardized Technical Specifications (STS) Generic Technical Specification Travelers (GTSTs), Docket ID NRC-2014-0147, September 22, 2014 (ML14265A493).

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 14 XI.

MARKUP of the Applicable GTS Subsection for Preparation of the STS NUREG The entire section of the Specifications and the Bases associated with this GTST is presented next.

Changes to the Specifications and Bases are denoted as follows: Deleted portions are marked in strikethrough red font, and inserted portions in bold blue font.

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level 3.9.4 AP1000 STS 3.9.4-1 Amendment 0Rev. 0 Revision 19 Date report generated:

Wednesday, May 27, 2015 Page 15 3.9 REFUELING OPERATIONS 3.9.4 Refueling Cavity Water Level LCO 3.9.4 Refueling Cavity Water Level shall be maintained 23 ft above the top of the reactor vessel flange.

APPLICABILITY:

During movement of irradiated fuel assemblies within containment.

ACTIONS

---

NOTE ----------------------------------------------------------

LCO 3.0.8 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A. Refueling cavity water level not within limit.

A.1 Suspend movement of irradiated fuel assemblies within containment.

Immediately SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.9.4.1 Verify that refueling cavity water level is 23 ft above the top of reactor vessel flange.

24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level B 3.9.4 AP1000 STS B 3.9.4-1 Amendment 0Rev. 0 Revision 19 Date report generated:

Wednesday, May 27, 2015 Page 16 B 3.9 REFUELING OPERATIONS B 3.9.4 Refueling Cavity Water Level BASES BACKGROUND The movement of irradiated fuel assemblies within containment requires a minimum water level of 23 ft above the top of the reactor vessel flange.

During refueling, this maintains sufficient water level in containment, refueling cavity, refueling canal,fuel transfer canal, and spent fuel pool to retain iodine fission product activity in the event of a fuel handling accident (Refs. 12 and 23). Sufficient iodine activity would be retained to limit offsite doses from the accident to within the values reported in FSAR Chapter 15 (Ref. 1).

APPLICABLE SAFETY ANALYSES During movement of irradiated fuel assemblies, the water level in the refueling cavity and the refueling canal is an initial condition design parameter in the analysis of a fuel-handling accident in containment, as postulated by Regulatory Guide 1.183 (Ref. 12).

The fuel handling accident analysis inside containment is described in Reference 23. This analysis assumes a minimum water level of 23 feet.

Refueling Cavity Water Level satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

LCO A minimum refueling cavity water level of 23 ft above the reactor vessel flange is required to ensure that the radiological consequences of a postulated fuel handling accident inside containment are within the values calculated in Reference 2.

APPLICABILITY Refueling Cavity Water Level is applicable when moving irradiated fuel assemblies inwithin containment. The LCO minimizes the possibility of radioactive release due to a fuel handling accident in containment that is beyond the assumptions of the safety analysis. If irradiated fuel assemblies are not being moved in containment, there can be no significant radioactivity release as a result of a postulated fuel handling accident. Requirements for fuel handling accidents in the spent fuel pool are covered by LCO 3.7.5, Spent Fuel Pool Water Level.

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level B 3.9.4 AP1000 STS B 3.9.4-2 Amendment 0Rev. 0 Revision 19 Date report generated:

Wednesday, May 27, 2015 Page 17 BASES ACTIONS LCO 3.0.8 is applicable while in MODE 5 or 6. Since irradiated fuel assembly movement can occur in MODE 5 or 6, the ACTIONS have been modified by a Note stating that LCO 3.0.8 is not applicable. If moving irradiated fuel assemblies while in MODE 5 or 6, the fuel movement is independent of shutdown reactor operations. Entering LCO 3.0.8 while in MODE 5 or 6 would require the optimization of plant safety, unnecessarily.

A.1 With a water level of < 23 ft above the top of the reactor vessel flange, all operations involving movement of irradiated fuel assemblies within containment shall be suspended immediately to ensure that a fuel handling accident cannot occur.

The suspension of fuel movement shall not preclude completion of movement to safe position.

SURVEILLANCE REQUIREMENTS SR 3.9.4 1 Verification of a minimum water level of 23 ft above the top of the reactor vessel flange ensures that the design basis for the analysis of the postulated fuel handling accident during refueling operations is met.

Water at the required level above the top of the reactor vessel flange limits the consequences of damaged fuel rods that are postulated to result from a fuel handling accident inside containment (Ref. 23).

The Frequency of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is based on engineering judgment and is considered adequate in view of the large volume of water and the normal procedural controls of valve positions which make significant unplanned level changes unlikely.

REFERENCES

1. FSAR Chapter 15, Accident Analyses.

12. Regulatory Guide 1.183, Alternate Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors.

23. FSAR Section 15.7.4, Fuel Handling Accident.

GTST AP1000-A23-3.9.4, Rev. 1 Date report generated:

Wednesday, May 27, 2015 Page 18 XII. Applicable STS Subsection After Incorporation of this GTSTs Modifications The entire subsection of the Specifications and the Bases associated with this GTST, following incorporation of the modifications, is presented next.

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level 3.9.4 AP1000 STS 3.9.4-1 Rev. 0 Date report generated:

Wednesday, May 27, 2015 Page 19 3.9 REFUELING OPERATIONS 3.9.4 Refueling Cavity Water Level LCO 3.9.4 Refueling Cavity Water Level shall be maintained 23 ft above the top of the reactor vessel flange.

APPLICABILITY:

During movement of irradiated fuel assemblies within containment.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. Refueling cavity water level not within limit.

A.1 Suspend movement of irradiated fuel assemblies within containment.

Immediately SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.9.4.1 Verify refueling cavity water level is 23 ft above the top of reactor vessel flange.

24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level B 3.9.4 AP1000 STS B 3.9.4-1 Rev. 0 Date report generated:

Wednesday, May 27, 2015 Page 20 B 3.9 REFUELING OPERATIONS B 3.9.4 Refueling Cavity Water Level BASES BACKGROUND The movement of irradiated fuel assemblies within containment requires a minimum water level of 23 ft above the top of the reactor vessel flange.

During refueling, this maintains sufficient water level in containment, refueling cavity, fuel transfer canal, and spent fuel pool to retain iodine fission product activity in the event of a fuel handling accident (Refs. 2 and 3). Sufficient iodine activity would be retained to limit offsite doses from the accident to within the values reported in FSAR Chapter 15 (Ref. 1).

APPLICABLE SAFETY ANALYSES During movement of irradiated fuel assemblies, the water level in the refueling cavity and the refueling canal is an initial condition design parameter in the analysis of a fuel-handling accident in containment, as postulated by Regulatory Guide 1.183 (Ref. 2).

The fuel handling accident analysis inside containment is described in Reference 3. This analysis assumes a minimum water level of 23 feet.

Refueling Cavity Water Level satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

LCO A minimum refueling cavity water level of 23 ft above the reactor vessel flange is required to ensure that the radiological consequences of a postulated fuel handling accident inside containment are within the values calculated in Reference 2.

APPLICABILITY Refueling Cavity Water Level is applicable when moving irradiated fuel assemblies within containment. The LCO minimizes the possibility of radioactive release due to a fuel handling accident in containment that is beyond the assumptions of the safety analysis. If irradiated fuel assemblies are not being moved in containment, there can be no significant radioactivity release as a result of a postulated fuel handling accident. Requirements for fuel handling accidents in the spent fuel pool are covered by LCO 3.7.5, Spent Fuel Pool Water Level.

GTST AP1000-A23-3.9.4, Rev. 1 Refueling Cavity Water Level B 3.9.4 AP1000 STS B 3.9.4-2 Rev. 0 Date report generated:

Wednesday, May 27, 2015 Page 21 BASES ACTIONS A.1 With a water level of < 23 ft above the top of the reactor vessel flange, all operations involving movement of irradiated fuel assemblies within containment shall be suspended immediately to ensure that a fuel handling accident cannot occur.

The suspension of fuel movement shall not preclude completion of movement to safe position.

SURVEILLANCE REQUIREMENTS SR 3.9.4 1 Verification of a minimum water level of 23 ft above the top of the reactor vessel flange ensures that the design basis for the analysis of the postulated fuel handling accident during refueling operations is met.

Water at the required level above the top of the reactor vessel flange limits the consequences of damaged fuel rods that are postulated to result from a fuel handling accident inside containment (Ref. 3).

The Frequency of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is based on engineering judgment and is considered adequate in view of the large volume of water and the normal procedural controls of valve positions which make significant unplanned level changes unlikely.

REFERENCES

1. FSAR Chapter 15, Accident Analyses.

2.

Regulatory Guide 1.183, Alternate Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors.

3.

FSAR Section 15.7.4, Fuel Handling Accident.